Home Learning 6.5.20

Number – Subtraction

Warm Up

Watch this video clip about subtraction

https://www.bbc.co.uk/bitesize/clips/zq2tfg8

Try these mental maths subtraction sums in your head;

10 – 4 = 8 – 4 = 7 -3 =

12 – 6 = 15 – 5 = 13 – 2 =

10 – 9 = 14 – 7 = 17 – 5 =

16 – 8 = 19 – 10 = 11 – 7 =

Main Task – Function Machines

Here is a subtraction ‘function machine’ which subtracts 1 from each number.

Whatever number you put in, it subtracts 1 and the answer comes out the other side.

Copy and complete the answers to these function machine subtraction sums like this;

8 – 3 = ? etc

Look carefully at the number you have to take away because each machine changes the number you have to subtract.

Fun Finisher

Play this fun subtraction game to improve your subtraction skills;

https://www.bbc.co.uk/bitesize/topics/zjkphbk/articles/zf4sscw

Challenge

Make up your own subtraction sums using this function machine.

Draw your robot and choose a number to write in the middle where the green rectangle is (no bigger than 10). This is the number you will be subtracting.

Choose a starting number that’s bigger than the one you will be subtracting and write it beside his first hand. Now subtract the middle number and work out the answer. Write the answer as it comes out the machine beside his other hand.