N5 | Maths Made Easy

N5

Question: Calculate the following (Non-calculator):

 𝑎) 2.86 \div 0.2

𝑏)  14.56 \div 0.56

c)  2.55 \times 6.4

 

a) To divide decimals, we want to multiply them both by the same power of 10, such that they’re no longer decimals. In this case, if we multiply both numbers by 100, we can then work out

286 \div 20

And the answer will be the same as the answer to 2.86\div 0.2. Now you can use your preferred method of division. Opting for the bus stop method here, we get

Therefore, the solution is

2.86 \div 0.2 = 14.3

b) To divide decimals, we want to multiply them both by the same power of 10, such that they’re no longer decimals. In this case, if we multiply both numbers by 100, we can then work out

1,456 \div 56

And the answer will be the same as the answer to 14.56\div 0.56. Now you can use your preferred method of division. Opting for the bus stop method here, we get

Therefore, the solution is

14.56 \div 0.56 = 26

 

c)  2.55 \times 6.4

 2 \times 6 = 12

 0.5 \times 6 = 3

 0.05 \times 6 = 0.3

 2 \times 0.4 = 0.8

 0.5 \times 0.4 = 0.2

 0.05 \times 0.4 = 0.02

Now we need to add up our results 

12+3+0.3+0.8+0.2+0.02 =16.32