3q Math4 Answer Key
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3Q – MATH ANSWER KEY I. NUMBER THEORY A. 1. F 2. T 3. T 4. T 5. T B. 1. P 2. P 3. P 4. C 5. C 6. P 7. C 8. P
IC. 1. 2. 3. 4. 5.
LCM 1) C 2) D 3) A 4) C 5) B
D C D B E
Problem Solving 1. Jan 9 2009 2. 1:00 pm
Problem Solving: 1. 6 2. 18
II.FRACTIONS 1. 2-3/10 2. 3/8 3. 4/7 4. 7/12 5. B 6. B 7. 4/14 or 1/7 8. 3/14 9. 5/14 10. ½ or 7/14
IIB 1. 29/8 2. 30/7 3. 19/13 4. 32/9 5. 17/6 6. 9-3/8 7. 5-1/9 8. 8-1/7 9. 6-3/4 10. 5-5/6
IID. 1. ¾ 2. 1/3 3. 9/10 4. 1/5 5. 1/6 6. 5/6 7. 1/3 8. 10/11 9. ¼ 10. 8/7
IIE. 1. 2. 3. 4. 5. 1.
< > = = > 56/24 2 2. 21/18 3 3. 50/14 2 4. 30/40 2
15/24 1 42/18 1 51/14 3 16/40 3
78/24 3 24/18 2 49/14 1 36/40 1
IIC. 1. E 2. G 3. A 4. C 5. B 6. 28 7. 4 8. 60 9. 75/35 10. 63 11. 14 12. 37 13. 59 14. 3 15. 7 16. IIIA LIKE FRACTIONS 1. 31/27 or 1-5/27 2. 3-16/21 3. 85/12 or 7-1/12 4. 2-5/6 5. 4-7/10 B. LOM 1. 7-5/8 + [4-3/8-1-7/8]=N N=10-1/8 2. [3-13/28 + 1-17/28] – 7/28 = N; N= 4-23/28 3. [2-14/25 – 1-12/25] +12=N; N = 13-2/25 4. 3-9/15 + [9-11/15 – 413/15] = N; N= 8-7/15 5. [5- 2-2/13] + 4/13 = N; N= 3-6/13 IV PROBLEM SOLVING 1. Tsuyoshi = 30 1st place Toshimasa = 27 2nd
Yuji = 15 3rd 2. Tito did not make it to the team. Jake – 1-12/20 Tito - 1-10/20 Jolo - 1-14/20 3. 12/28 + 9/28 = n ¼ of the barbeque was not sold 4. 3-4/5 – 1-1/4 = N Rick consumed 2-11/20 liters of gas. 5. 17-1/4 + 2-5/8=N Phil weighs 19-7/8 kg 6. 10 – [4-3/4+3-2/3]=N 1-7/12 kg of husks will be left 7. 20 – 25/10 = n Carol should pack not more than 17-4/5 kg. 8. [2-1/2 – 1-1/4] + 3-2/3=N Gary was 4-11/12 in. from the starting line. 9. 24 is 2/3 of N There were 36 magazines.
IC. 1. 2. 3. 4. 5.
LCM 1) C 2) D 3) A 4) C 5) B
D C D B E
Problem Solving 1. Jan 9 2009 2. 1:00 pm
Problem Solving: 1. 6 2. 18
II.FRACTIONS 1. 2-3/10 2. 3/8 3. 4/7 4. 7/12 5. B 6. B 7. 4/14 or 1/7 8. 3/14 9. 5/14 10. ½ or 7/14
IIB 1. 29/8 2. 30/7 3. 19/13 4. 32/9 5. 17/6 6. 9-3/8 7. 5-1/9 8. 8-1/7 9. 6-3/4 10. 5-5/6
IID. 1. ¾ 2. 1/3 3. 9/10 4. 1/5 5. 1/6 6. 5/6 7. 1/3 8. 10/11 9. ¼ 10. 8/7
IIE. 1. 2. 3. 4. 5. 1.
< > = = > 56/24 2 2. 21/18 3 3. 50/14 2 4. 30/40 2
15/24 1 42/18 1 51/14 3 16/40 3
78/24 3 24/18 2 49/14 1 36/40 1
IIC. 1. E 2. G 3. A 4. C 5. B 6. 28 7. 4 8. 60 9. 75/35 10. 63 11. 14 12. 37 13. 59 14. 3 15. 7 16. IIIA LIKE FRACTIONS 1. 31/27 or 1-5/27 2. 3-16/21 3. 85/12 or 7-1/12 4. 2-5/6 5. 4-7/10 B. LOM 1. 7-5/8 + [4-3/8-1-7/8]=N N=10-1/8 2. [3-13/28 + 1-17/28] – 7/28 = N; N= 4-23/28 3. [2-14/25 – 1-12/25] +12=N; N = 13-2/25 4. 3-9/15 + [9-11/15 – 413/15] = N; N= 8-7/15 5. [5- 2-2/13] + 4/13 = N; N= 3-6/13 IV PROBLEM SOLVING 1. Tsuyoshi = 30 1st place Toshimasa = 27 2nd
Yuji = 15 3rd 2. Tito did not make it to the team. Jake – 1-12/20 Tito - 1-10/20 Jolo - 1-14/20 3. 12/28 + 9/28 = n ¼ of the barbeque was not sold 4. 3-4/5 – 1-1/4 = N Rick consumed 2-11/20 liters of gas. 5. 17-1/4 + 2-5/8=N Phil weighs 19-7/8 kg 6. 10 – [4-3/4+3-2/3]=N 1-7/12 kg of husks will be left 7. 20 – 25/10 = n Carol should pack not more than 17-4/5 kg. 8. [2-1/2 – 1-1/4] + 3-2/3=N Gary was 4-11/12 in. from the starting line. 9. 24 is 2/3 of N There were 36 magazines.
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