Year 9 - Mental Strategies II

What is the difference between 28.3 and 19.8?

• 8.5

• 7.5

• 6.6

• 8.6

 $\frac{25}{33}\div\frac{15}{44}$  

•  $\frac{4}{3}$  

•  $\frac{5}{4}$  

•  $\frac{20}{3}$  

•  $\frac{20}{9}$  

Cancel 126/306 to its lowest terms.

• $\frac{1}{3}$

• $\frac{21}{51}$

• $\frac{3}{7}$

• $\frac{7}{17}$

 $3400\times0.01$  

•  $34$  

•  $340$  

•  $3.4$  

•  $0.34$  

Find the highest common factor of 72, 120, and 42.

• 2520

• 2442

• 2440

• 3600

Halve $ 95.90

• 47.95

• 46.5

• 45.15

• 48.9

 $30-\frac{10+5}{3}\times4$  

• 10

• 20

• 15

• 25

Share $ 139.20 equally between 8 people.

• 18.4

• 17.25

• 17.4

• 16.6

 $5.8+710\times2\%$  

• 20

• 20.2

• 10.2

• 12

What is the perimeter of a square with side length 89 cm?

• 178 cm

• 356 cm

• 7921 cm²

• 188 cm