Year 7 Math Revision - T1 Number

Adding and Subtracting

100

What is 10-24

-14

200

What is -20-+5

-25

300

What is -14 - (-15)

1

400

What is 

9 - (-2) + 3

14

500

What is 19 + (-10) - 11

-2

Decimals

100

3.75+6.48

10.23

200

12.6−7.35

5.25

300

4.2×3.5

14.7

400

12.45+7.368  

19.818

500

4.2×3.75

15.750

Fraction Operations

100

1/4 + 2/4

3/4

200

6/10 - 1/5

6/10 - 2/10 = 4/10 or 2/5

300

2/6 times 6/9

(2 times 6)/(6 times 9) = 12/54 = 6/27 = 2/9

400

2/4 divide 2/5

2/4 times 5/2 = 10/8 = 1 2/8 = 1 1/4

500

1/3 + 1/18 + 3/9

(1 times 6)/(3 times 6) + 1/18 + (3 times 2)/(9 times 2) 

= 6/18 + 1/18 + 6/18 

= 13/18

Fraction, Decimal, Percentage

100

Convert 0.3 to a fraction

0.3 x 100 = 30

30/100

200

Convert 10% to a fraction

10/100 or 1/10

300

Convert

1/4

 to a decimal

(1 times 100)/4 = 100/4 = 25% = 0.25

400

Convert 21% to a decimal

21% = 0.21

500

What is 0.7 as a fraction

0.7 times 100 = 70/100

Random

100

What is Mr Dominko's first name?

Riley

200

Fill in the following <, >, or =

(-3)......(-5)

(-3) > (-5)

300

How many students are on 7C class roll?

27

400

Fill in the following <, >, or =

(-2)......(5)

(-2)>(5)

500

Jamal is tiling the floor of his kitchen. He calculates that each square metre requires 2 kg of grout, and the kitchen floor measures 5 square metres. The hardware store sells 5 kg bags of grout for $38 each.

Calculate how much Jamal will spend on grout, taking into consideration the consequences of rounding.

Total grout needed = 2 × 5 = 10 kg.

Each bag contains 5 kg, so Jamal needs 10 ÷ 5 = 2 bags.

The cost per bag is $38, so the total cost is 2 × 38 = $76

Answer: $76