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\ 14-Nov-2025 Bharat Arora Proof-7 Reader’s Sign _______________________ Date __________

Exercise 3A

1. Fill in the blanks.
a. 26 – 0 = _____ b. 31 – _____ = 31 c. 75 – 75 = _____

d. 93 – _____ = 0 e. 57 – 1 = _____ f. 88 – _____ = 87

g. _____ – 0 = 18 h. _____ – 1 = 41 i. _____ – 55 = 0

2. Use the number grid to subtract.

a. 26 – 5 = 1 2 3 4 5 6 7 8 9 10

b. 58 – 14 = 11 12 13 14 15 16 17 18 19 20

c. 64 – 23 = 21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
d. 29 – 11 =
41 42 43 44 45 46 47 48 49 50
e. 84 – 8 =
51 52 53 54 55 56 57 58 59 60
f. 56 – 29 =
61 62 63 64 65 66 67 68 69 70
g. 74 – 21 = 71 72 73 74 75 76 77 78 79 80

h. 84 – 23 = 81 82 83 84 85 86 87 88 89 90

i. 35 – 24 = 91 92 93 94 95 96 97 98 99 100

REGROUPING NUMBERS FOR SUBTRACTION

Sometimes, there are not enough ones to subtract from. In such situations,
we need to regroup.

1 ten = 10 ones

= =
23 = 2 tens 3 ones = 1 ten 13 ones 36 = 3 tens 6 ones = 2 tens 16 ones

Some more examples:

a. 3 tens + 5 ones = 2 tens + 1 ten + 5 ones

= 2 tens + 10 ones + 5 ones = 2 tens + 15 ones

52 Mathematics 2