Doubles and Halves Maths Games For Year 4 (age 8-9)
Being able to double and halve quickly is a really powerful tool to help with mental arithmetic. These activities give plenty of practice with doubling numbers up to 50 as well as doubling and halving multiples of 10 and 100.
Double Numbers up to 50
Lots of different mental strategies are needed to work out these doubles.
Double Multiples of 10
Use knowledge of doubling 2-digit numbers to double multiples of ten.
Double Multiples of 100
Use knowledge of doubling 2-digit numbers to double multiples of 100.
Identify Near Doubles
Numbers close to each other can be added by doubling and then adjusting.
Double any Multiple of 5 up to 100
Straightforward doubling of multiples of 5.
Halve Multiples of 10 up to 200
Finding half of multiples of ten, up to 200.
Divide by 4 by Halving and Halving
Numbers can be divided by 4 by halving them and then halving again.
Halve 2-digit Numbers
Halving 2-digit numbers is the challenge this time. Luckily all the numbers are even.
Double 2 Digit Numbers
Click on the planes to match the numbers with the doubles.
