We are going to study Subtraction by Backward Counting.

I. Subtraction by Backward Relying on a Quantity Strip:

1.

To seek out out 6 – 2, put your finger on 6 and transfer 2 steps backwards.

You attain 4.

So, 6 – 2 = 4

2.

To seek out out 7 – 4, put your finger on 7 and transfer 4 steps backwards.

You attain 3.

So, 7 – 4 = 3

We are able to subtract by counting backward on the quantity strip.

3. 

To seek out 15 – 6, put your finger on 15 and transfer 6 steps backwards.

You attain 9.

So, 15 – 6 = 9

II. Subtraction by Backward Counting:

1. To seek out out 4 – 3, start with 4 and depend 3 numbers backwards.

So, 4 – 3 = 1

2. To subtract 4 from 8, start with 8 and depend 4 numbers backwards.

So, 8 – 4 = 4

We are able to depend backward like this additionally.

3. To subtract 6 from 18, start with 18 and depend 6 numbers backwards.

So, 18 – 6 = 12

Worksheet on Subtraction by Backward Counting:

1. Fill within the containers.

(i) 5 – 1 = ☐

(ii) 3 – 1 = ☐

(iii) 5 – 3 = ☐

(iv) 6 – 3 = ☐

(v) 7 – 2 = ☐

(vi) 9 – 5 = ☐

(vii) 8 – 4 = ☐

(viii) 6 – 5 = ☐

2. Subtract by counting backwards and fill within the containers.

3. Now work out these subtraction downside.

4. Do these subtractions by counting backwards.

First Grade Math Actions

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