Mental maths

 

Multiply these numbers together in your head

a) =
b) =
c) =
d) =
e) =

 

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How to multiply in your head

 

To multiply by a number between 11 and 13 in your head, you just multiply by 10 then multiply by the units and add the two numbers together in your head.

Example   5 x 13 = (5 x 10 = 50) + (5 x 3 = 15)

              = 50 + 15

                        = 65

                        

 

Practice answering some more questions using your calculator.

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Year 5 Maths
Spring term

Block A
Lesson 9

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Summer term

Autumn term

 

 

 

 

 

 

 

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