2. Decrease
Subtract
Difference
Minus
Less
Reduce
Take from
Subtrahend

3. Subtraction Calculation
subtract equals
minuend subtrahend difference
9 – 3 = 6

4. Real Life Subtraction
Use real life every day situations, drawing children’s attention to every day situations that show subtraction. E.g:
Giving milk out, seeing the cartons be taken away, how many left?
Having a bowl of ten sweets, how many have you eaten? How many are left? If you give me one how many are left?

5. Subtracting through songs6 8 3 2 1 4 5 9 7 6 3 2 1 4 5 2 1
10 green bottles
6 green bottles
2 green bottles 6 8 3 2 1 4 5 9 7 3 2 1 4 5
9 green bottles 1
5 green bottles 6 8 3 2 1 4 5 7
1 green bottle 3 2 1 4
8 green bottles
4 green bottles 6 3 2 1 4 5 7 3 2 1
No green bottles
7 green bottles
3 green bottles

6. One less Can you take one away? How many are left?
So, one less than seven is six.

7. 1 less
Problem:
What is one less than 9?
Vocabulary
Less

8. Subtraction with objects
8-4=4
5-2=3

9. 5-4=1 Subtracting using fingers
I then put 4 down. This will then give me 1.
First I start with 5 fingers

10. Number Bonds Additions Subtractions 10+0=10 0+10=10 10-0=10 10-10=0
9+1=10
1+9=10
10-1=9
10-9=1
8+2=10
2+8=10
10-2=8
10-8=2
7+3=10
3+7=10
10-3=7
10-7=3
6+4=10
4+6=10
10-4=6
10-6=4
5+5=10
10-5=5

11. Additions
Subtractions
1+0=1
0+1=1
1-0=1
1-1=0
2+0=2
0+2=2
2-0=2
2-2=0
1+1=2
2-1=1
3+0=3
0+3=3
3-0=3
3-3=0
2+1=3
1+2=3
3-2=1
3-1=2
4+0=4
0+4=4
4-0=4
4-4=0
3+1=4
1+3=4
4-1=3
4-3=1
2+2=4
4-2=2

12. Additions
Subtractions
5+0=5
0+5=5
5-0=5
5-5=0
4+1=5
1+4=5
5-1=4
5-4=1
3+2=5
2+3=5
5-2=3
5-3=2
6+0=6
0+6=6
6-0=6
6-6=0
5+1=6
1+5=6
6-1=5
6-5=1
4+2=6
2+4=6
6-2=4
6-4=2
3+3=6
6-3=3
7+0=7
0+7=7
7-0=7
7-7=0
6+1=7
1+6=7
7-1=6
7-6=1
5+2=7
2+5=7
7-2=5
7-5=2
3+4=7
4+3=7
7-3=4
7-4=3

13. Additions
Subtractions
8+0=8
0+8=8
8-0=8
8-8=0
7+1=8
1+7=8
8-1=7
8-7=1
6+2=8
2+6=8
8-2=6
8-6=2
5+3=8
3+5=8
8-3=5
8-5=3
4+4=8
8-4=4
9+0=9
0+9=9
9-0=9
9-9=1
8+1=9
1+8=9
9-1=8
9-8=1
7+2=9
2+7=9
9-2=7
9-7=2
6+3=9
3+6=9
9-3=6
9-6=3
5+4=9
4+5=9
9-4=5
9-5=4

14. Subtracting by counting back using a number line.

15. counting back mentally
Subtracting by
counting back mentally
7 – 1 = 6
10 – 2 = 8
25 – 5 = 20
100 – 10 =90

16. Subtract a 1-digit number from a 2- digit number
17 – 5 =
24 – 3 =
16 – 6 =
23 – 7 =

17. Subtracting by
counting up
14 – 12 = 2 +2 12 14

18. First subtract your tens.
Partitioning
39 – 23 = 30 20 3 9
First subtract your tens.
30-20=10
Then your ones
9-3=6
Finally recombine
10+6=16

19. Subtracting 10 from
multiples of 10
+ 10

20. Subtracting by counting back in 10s 90 – 50 = 40
To count back in tens you need to know your 10 times tables
10,20,30,40,50,60,70,80,90,100,110 & 120.
90-50= 10
90 – 50 = 40

21. Subtracting 10 using a number square2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
100
When subtracting 10 you count back ten squares from your starting number.
Now try =
Make some up yourself.
27 – 10 = 17
Or you can jump to the number directly above.

22. Counting back in 10s
-10
-10
-10
-10
68-40=28
Ones remain the same.

23. Subtracting 9 by subtracting
10 and adjusting.
46 - 9
First subtract 10
46-10=36
36+1=37
Then add 1

24. Subtracting 100
468 – 100 = 368
987 – 100 =887
635 – 100 = 535
1,786 – 100 = 1,686
What do you notice?

25. Finding the difference by
counting up.
49-36=
This question can be worked out quickly by using a number line and counting up. +9 +4 36 49 40
4+9=13.

26. Can you use this method to subtract 96? 93?
How to calculate
127 – 95=
First subtract 100
Can you use this method to subtract 96? 93?
=27
27+5=32
Then add 5

27. Another method:
127 – 95 = 32
+20 +7 +5 95
100
120
127
5+20+7= 32

28. 387 – 294 = 93
When you partition, it is easier to see that you borrow from the hundreds column.
0+90+3
=93
200
387
294 93

29. Subtraction by decomposition
4.Finally you are left with a 3 in the thousands column. Below there is no number to take away so you just take zero away.
=3000
Tip-Always start at the right and make sure your larger number is on the top.
1. First you start with the ones column 1-0=1. 1 5 3
2. Next you look at the tens column
This is not possible to do without borrowing one from your neighbour (left side), the hundreds. After borrowing one hundred it will make your number into =90
4621
- 730
3891 1
3.Again is not possible to do without borrowing. So borrow from neighbour (left), the thousands column, which will then make your number =800

30. Subtraction of decimals1 3 1 6 £
7.89 £ 1
Remember to line your decimals up like shirt buttons!