Page 49 - MTH 1

T O
1 ten – 0 ten 1 5 5 ones – 4 ones

= 1 ten – 4 = 1 one

1 1

So, 15 – 4 = 11

Subtract by backward counting.

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

13 – 7 =

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

19 – 8 =

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

15 – 5 =

Subtract by stroke method.

13 – 7 = 14 – 9 = 18 – 6 =

11 – 4 = 15 – 8 = 17 – 6 =

Subtract the following.

1 3 1 9 1 8 1 9
– 2 – 8 – 5 – 6

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Mathematics In Focus - 1