Grade2 1st Q Math-answer Key

GRADE2_1st Q_MATH I. STANDARD AND EXPANDED FORMS OF A NUMBER A. DIRECTIONS: Write the following numbers in STANDARD form. ____3027_____ 1.

three thousand, twenty-seven

____8072_____ 2.

8 thousands + 2 ones + 7 tens

____9653_____ 3. 50 + 600 + 3 + 9000 ____8903_____ 4. 8 thousand, 9 hundred, 3 B. DIRECTIONS: Complete the following: 5.

4 378 = 4000 + _300____ + 70 + ___8____

6.

8 442 = _8000_____ + 400 + ___40____ + 2

7.

6 207 = 6000 + ____200___ + ____0____ + 7

C. DIRECTIONS: Write the numbers in expanded form. 8. 58 = ______50_+_8________________________________ 9. 259 = ______200_+_50_+_9__________________________ 10. 5 196 = ___5000 + 100 + 90 + 6______________________ II.

PLACE VALUE AND VALUE

A. DIRECTIONS: Give the place value of the digit 8. 1. 7185

____tens_____________

2. 8074

____thousands________

3. 4847

____hundreds_________

4. 9738

____ones_____________

B. DIRECTIONS: Answer the following questions: 5. Give the place value of the underlined digit. a. 3 569

b. 4 968 Hundreds

c. 297 Hundreds

d. 1 781 Thousands

Tens 6. Give the value of the underlined digit a. 51

b. 4 968 900

c. 624 20

d. 5 321 5 000

1 7. In the number six thousand four hundred five, a. What is the number above in standard form? ___ 6405_____ b. What is the place value of the digit 0? _____tens________ c. What is the digit in the ones place? _____5___________ d. What is the value of the digit in the thousands place? ____6 000___ e. How do you expand the number above using place value? _6

thousands + 4 hundreds + 5 ones f. What is the place value of the digit 6? _____thousands___ g. What is the digit in the hundreds place? ___4_____________

8. In the number eight hundred ninety six, h. What is the digit in the ones place? ____6____________ i. What is the digit in the hundreds place? __8______________ j. What is the place value of the digit 9? ____tens_________ k. What is the place value of the digit 8? _____hundreds____ l. What is the value of the digit 6? _____ones________ 2

III. ROMAN NUMERALS A. DIRECTIONS: Express these Roman numerals as Hindu-Arabic numerals. 1. XIII = ___13____

7. LXII = ___62____

2.

XVII = ___17____

8. XXXI = ___31____

3.

XXXI = ___31____

9. XXIV = __24_____

4.

XLIV = ___44____

10.XXIX = __29_____

5.

LIX = ___59____

11.XXXVI = ____36___

6.

XIII = ___13____

12.LV = ____55___

B. DIRECTIONS: Change these Hindu-Arabic numerals to Roman numerals. 1. 37 = __XXXVII_ 6. 39 = _XXXIX___ 2. 42 = __XLII___

7. 70 = __LXX____

3. 63 = __LXIII__

8. 66 = __LXVI___

4. 24 = __XXIV___

9. 58 = __LXVIII_

5. 46 = __XLVI___

10.15 = ___XV____

C. DIRECTIONS: Change the underlined numeral to a Roman or HinduArabic numeral 1. ___36______ Three dozen eggs is the same as XXXVI eggs. 2. _XCV_____ Our class has collected 95 kilograms of old

newspapers. 3. _XXXVIII_____ It takes about 38 weeks for a baby to develop

within a mother’s womb. 4. __52____ There were LII participants in the math quiz bee. 5. ___77____ More than LXXVII families were affected by the flood. 3

IV. HOW MANY 1s, 10s AND 100s IN A GIVEN NUMBER DIRECTIONS: Fill in the blanks. Number No. of 100s 1. 68 X 2. 589 5 3. 280 2 4. 38 X 5. 902 9 6. 400 4 7. 781 7 8. 90 X 9. 790 7 10. 506 5

No. of 10s 6 58 28 3 90 40 78 9 79 50

No. of 1s 68 589 280 38 902 400 781 90 790 506

V. ROUNDING TO THE NEAREST TENS DIRECTIONS: Round to the nearest tens 1.

67

___70___

4.

33

___30___

2.

32

___30___

5.

82

___60__

3.

89

____90__

DIRECTIONS: Encircle the number to which the given number is closer. 1. 68

60 or 70

4. 661

600 or

700

2. 113

100 or

200

5. 4500

4000 or

5000

3. 248

240 or

250

6. 3210

3000 or

4000

C. DIRECTIONS. Round off each number to the given place value 1. 27 (tens)

30

2. 86 (tens)

90

3. 131 (hundreds)

100

4. 412 (tens)

400

5. 390 (hundreds)

400

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V. COMPARING AND ORDERING NUMBERS A. DIRECTIONS: Write >, <, or = in the box to compare each pair of numbers. < 1)

Sixty-seven

LXVI =

2)

LIX

3)

Two hundreds, one tens, 6 ones

59 = 200 + 6 + 10 >

4)

One hundred, eight tens

100 + 8 >

5)

112

One hundred, 2 ones >

6)

3 042

Three thousand + 4 ones + 2 tens =

7)

One thousand, 8 ones, 9 tens

1 098 <

8)

Six hundreds, 5 tens, 8 ones

600 + 5 + 80 <

9)

4 000 + 100

Four thousand + 1 ones + 1 hundred <

10) 2 417

2 471

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B. DIRECTIONS: Arrange the following numbers by writing 1-4 on the blank. Least to Greatest 1. ____2___

2.

354

____3___ 50 + 300 + 4 000

____4___ 543

____2___ 3 000 + 500 + 40

____3___ 435

____4___ 5 000 + 400 + 30

____1___ 345

____1___ 3 000 + 50 + 400

3. ______2______ One hundred nine ______4______ One hundred ninety ______1______ One hundred four ______3______ One hundred nineteen Greatest to Least 4. ____3___ 8 000 + 200 + 80 + 3 ____1___ 9 000 + 200 + 40 + 9 ____4___ 6 000 + 300 + 50 + 8 ____2___ 8 000 + 300 + 50 + 8 5. ____2___ XXVII ___4____ XXI ___1____ XL ___3____ XXIV

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C. DIRECTIONS: Arrange the following numbers in ascending order. Write your answers on the blanks. 1) 125, 129, 121, 127

121 – 125 – 127 – 129

2) 506, 511, 503, 520

503 – 506 – 511 - 520

3) 1 001, 1 010, 1 100, 1 111

1 001 – 1 010 – 1 100 – 1 111

D. DIRECTIONS: Arrange the following numbers in descending order. Write your answers on the blanks. 1) 213, 208, 241, 222

241 – 222 – 213 - 208

2) 446, 408, 444, 438

446 – 444 – 438 - 408

3) 3 671, 3 409, 3 197, 3 450

3 671 – 3 450 – 3 409 – 3 197

VI.

ADDITION – PROPERTIES, LANGUAGE OF MATH

A. DIRECTIONS: Write the missing number in each equation. On the blank before each item, write ZPA for the Zero Property of Addition, OPA for the Order Property of Addition and GPA for the Grouping Property of Addition. ___OPA__ 1. __28_ + (19 + 2) = (19 + 2) + 28 ___GPA___ 2.

(11 + 9) + 6 = 11 + (9 + _6__)

___ZPA___ 3.

16 + _0__ = 16

___OPA___ 4.

21 + 8 + 4 = 4 + __21_ + 8

___ZPA___ 5.

120 + 0 = __120__

___OPA___ 6.

(XX + L) + III = III + (XX + L)

___ZPA___ 7.

sixty-three plus zero equals __sixty-three_______

___ZPA___ 8.

309 = __309___ + 0

___GPA___ 9.

90 + (2 + 8) = (90 + 2) + 8

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__OPA____ 10.

VIII + XII + IV = IV + XII + VIII

B. LOM. 1. The addends are 71 tens, 19 ones, and two tens and 6 ones. What is the sum? S/A: E: 719 + 26 = N N = 745

2. What is the total of one thousand sixty-two and 95 tens ? S/A: E: 1 062 + 950 = N N = 2 012

3. What is 817 plus 4 ones and 9 tens equal to?

S/A: E: 817 + 94 = N N = 911

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4. What is the result if you combine 12 hundreds and 76 ones with 27

tens? S/A: E: 1 276 + 270 = N

N = 1 546

5. What will you get when you put together two thousand seven hundred eighty-nine and 988? S/A: E: 2 789 + 988 = N N = 3 777

VII. SUBTRACTION. LOM; WITH ZERO DIFFICULTY 1. The minuend is 80 tens and the subtrahend is 64 ones. What is the difference? S/A: E: 800 - 64 = N N = 736

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2. What is left if you take away XLIX from two hundred five? S/A: E: 205 – 49 = N N = 156

3. LXVI less 4 tens + 9 ones is what number? S/A: E: 66 – 49 = N N = 17

4. What is three hundred fifty-seven less than 543 equal to? S/A: E: 543 – 357 = N N = 186

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5. 1 tens + 2 hundreds + 6 ones minus XXVI is what number? S/A: E: 216 – 26 = N N = 190

6. How much more is eight thousand ten than 4 219? S/A: E: 8 010 – 4 219 = N N = 3 791

7. What is the answer if you take away LXXIX from 20 tens? S/A: E: 200 – 79 = N N = 121 8. How much less is 726 than two thousand three? S/A: E: 2 003 – 726 = N N = 1 277

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9. What is left if 1 000 + 6 is subtracted by 17 tens? S/A: E: 1 006 – 170 = N N = 836

10. Four thousand three hundred minus 2 495 is what number? S/A: E: 4 300 – 2 495 = N N = 1 805

VII. PROBLEM SOLVING: Write the equation, solve and label your final answer. 1. Lightning McQueen wants to check the number of miles he needs to travel to get to the race. The number is equal to 2 cubes, 4 flats, 6 rods and 5 blocks. What is this number? Draw your solution. 2 000 + 400 + 60 + 5 = N N = 2 465

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2. Joseph has 365 marbles in his marble collection. He wants to put them in small bags. If each bag can hold at most 100 marbles, how many full bags will he have? How many marbles were left? 3 BAGS, 65 MARBLES LEFT

3. Allen Iverson went to the NBA store to buy clothes and shoes. He bought 5 jerseys and about 30 pairs of shoes. What is the least number of pairs of shoes that Allen may have bought? 25 pairs

4. Lebron James also went to the NBA store to buy NBA key chains for his fans. He left the store with a bag of around 200 key chains. What was the greatest possible number of key chains in the bag? 249 key chains

5. The Miami Heat team celebrated its victory by having an exclusive dinner for close friends. The team invited around 40 guests and 3 news reporters. How many guests may have been at the dinner? List down all the possible answers. 35 36 37 38 39 40 41 42 43 44

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6. Carlo wants to travel by bicycle to these cities. Manila City Quezon City Makati City Kalookan City

1 686 km 1 8 37 km 1 561 km 1 637 km

a. Which city is the farthest? ________Manila City_____________ b. Which city is the nearest? ________Makati City_____________

7. Gaita’s friends had a bicycle race from their garage to the guest house. The numbers below show how long it took them to reach the finish line. Erika Therese Ysabel Viola

1 hour, 30 minutes, 2 seconds 1 hour, 3 seconds, 20 minutes 1 hour, 20 minutes, 1 second 1 hour, 2 seconds, 10 minutes

a. Who is the fastest biker? ___Viola_______________ b. Who is the slowest biker? ___Erika______________ 8. Ash is now 30 years old and is retiring from the Pokemon league. In his collection, he has fifteen water Pokemon, XII fire Pokemon, and a dozen electric Pokemon. Throughout his career, Ash has received 24 medals. How many Pokemon does ash have in his collection? 15 + 12 + 12 = n n = 39 Pokemon

9. Frank has XIX attack cards, LII defense cards and 30 + 6 Master cards. How many Yu-Gi-Oh cards does he have in all? 19 + 52 + 36 = n n = 107 cards

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10. The Gr. 2 classes collected 5 peso coins for the Bigay Puso drive. 2Halcon had 2 tens + 2 hundreds + 0 ones in the container, 2-Matutum had 403 coins and 2-Samat had LXIX coins. How many coins were there in all? 220 + 403 + 69 = n n = 692 coins 11. Julius and Gary liked collecting and framing insects. Julius has 5 211 butterflies and 1 300 beetles. Gary has 626 butterflies and 2 467 leeches. Julius has how many more butterflies than Gary? 5 211 – 626 = n n = 4 585 butterflies

12. There were LXXX people who joined the Philippine Idol singing contest. On the first screening day, thirty five people were eliminated. Two dozen other people made it to the second round. The rest were told to come back the next day. a) How many people were screened by the judges on the first day? 35 + 24 = n n = 59 people b)

How many people came back the second day?

80 – 59 = n n = 21 people

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REVIEW YOUR ANSWERS!!!

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