Grade 8 Math Worksheet (1)

October 26, 2009 Name: _____________

Grade 8 Math Worksheet (1)

I- Which of the following represents a proportionality situation? Justify your answer. 3 15

10 2

a)

b) In 2 hours Rida travels 40 km on his bike. In 4 hours he travels 80 km

II- Students in grade 8 were asked to read a book of 240 pages. a) Karim read 180 pages of the book. What is the percentage of pages read? b) Wael read 60% of the book. How many pages did Wael read? c) Who still needs to read more in order to finish the book, Karim or Wael? Justify your answer. III- The distance between two cities is 950km represented by 19cm on the map. a) What is the scale of the map? b)What should be the real distance between two other cities if that distance is 7cm on the map? IV- In the following table of proportionality, determine the multiplicative operator then calculate a and b. 360 240

600 a

b 4.8

V- Given the following: 10 15 × 210 A= 5 × 4 × 10 12 × 2 9

B= 2 2 × 7 − 180 × 10 −1 C= − 8 2 − (1 − 7 ) 2 a) Simplify then calculate A, B and C b) Arrange in increasing order. VI- Hadia weighs 62 kg. She needs to lose 8 kg. What percentage of her weight is this?

VII- A dress in a store usually sells for 60$. Wich is more of a discount 25% or 25$? IX- The price of a computer is decreased from $1450 by 15%. What is the new price? X- Change

1 into 8

a) A decimal fraction b) A percentage XI- a) The track of an airport measures 2.8km. What is, in cm, the length of this track on a map of scale 1 50000

?

b) Calculate the original distance in km between two villages when their distance on a map whose scale is

1 is equal to 3.5cm 200000