2 0 . 5 . 2 0 lo: to use column subtraction.albanwood.herts.sch.uk/data/documents/year...

Maths 20.5.20.notebook

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2 0 . 5 . 2 0

LO: To use column subtraction.


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Good morning Year 3! Today and tomorrow we are going to revise using column subtraction. We will practise some problems together before you try some by yourselves.


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4 8 1 2

H T O4 8

1 2

You need to make sure that you start by subtracting the ones first before subtracting the tens.


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4 8 1 2

H T O4 8

1 26

3 0

Then add your ones and tens answers to get your final answer.


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4 8 1 2

H T O4 8

1 26

3 0

Let's try another one together.

3 6


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7 6 3 4

H T O7 6

3 4Remember to write each digit in its own column.


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7 6 3 4

H T O7 6

3 4Are you going to add vertically to get your final answer?

4 02


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7 6 3 4

H T O7 6

3 4Let's try another together.

4 02

4 2


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6 5 4 9

H T O6 5

4 9

When you don't have enough ones to subtract, you must take from the next ten.


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6 5 4 9

H T O6 5

4 9

Did you exchange a ten for 10 ones?5 1

61 0


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6 5 4 9

H T O6 5

4 9

Let's try one more problem together.5 1

61 01 6


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8 1 5 2

H T O8 1

5 2Try to use the tips we've worked with so far.


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8 1 5 2

H T O8 1

5 2Did you remember to exchange a ten for 10 ones?

7 1

92 0


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8 1 5 2

H T O8 1

5 2

7 1

92 02 9


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Now it's time to work by yourself. Remember, you can choose your own challenge or you could try a few questions from each challenge. You'll be able to check your answers afterwards. Good luck!


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Mild Spicy Super Hot57 2385 4564 3299 40

58 2695 7165 2478 53

92 3580 3773 46364 207

781 546297 149823 273954 716

2837 15623764 18134892 29545526 12948358 38516915 23197463 45934736 1347


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Time to check your answers!


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Mild Spicy Super Hot

57 23 = 34

85 45 = 40

64 32 = 32

99 40 = 59

58 26 = 32

95 71 = 24

65 24 = 41

78 53 = 25

92 35 = 57

80 37 = 43

73 46 = 27

364 207 = 157

781 546 = 235

297 149 = 148

823 273 = 550

954 716 = 238

2837 1562 = 1275

3764 1813 = 1951

4892 2954 = 1938

5526 1294 = 4232

8358 3851 = 4507

6915 2319 = 4596

7463 4593 = 3870

4736 1347 = 3389


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Tomorrow we are going to continue working with column subtraction and look at more examples where we need to exchange. See you tomorrow!

2 0 . 5 . 2 0 lo: to use column subtraction.albanwood.herts.sch.uk/data/documents/year...

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