Rules for subtraction using a number line.

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Rules for subtraction using a number line.

• Everything you need to remember!

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So what words mean subtract (take away)
Which will appear in the box? altogether take
away share decrease fewer than total difference r
educe less than add
take away
decrease
reduce
less than
difference
fewer than
3
Never swap your numbers around!

• 53 25 is not the same as 25 53!!
• Leave your take away calculations in the same
  order! Take the small number from the BIG number

4
Lets do a subtraction like an addition!

• Remember that subtract also means find the
  difference. So look at the number we are taking
  away and start there
• 53 25

25
30
40
50
53
Lets make a jump that we know.
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Lets do a subtraction like an addition!

• Now all we need to do is count how far we jumped!
  
• 53 25

28
10
3
5
10
25
30
40
53
50
1010 20
5 3 8
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Set your workings out in stages!

• Stage 1 53 25
• Stage 2 Start at 25
• Stage 3 Count on in jumps that we knowtry
  a small one first
• Stage 4 Then jump in tens until your tens are
  the same, then single units if you like!

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• Remember these
• rules and youll
• never go wrong again!