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E:\Working\Focus_Learning\Math_Genius_2_(09-10-2023)\Open_Files\Chap_03
\ 16-Feb-2024 Bharat Arora Proof-6 Reader’s Sign _______________________ Date __________

SUBTRACTION ON A NUmBeR GRID

Anna wanted to surprise her mother on Mother’s
Day. So, she baked 56 apple pies.

When she served it to her mother, she became
glad. Mother invited her neighbours also to eat

pies.

They managed to eat 24 pies in all.
Now, Anna wants to know how many pies are

left. 1 2 3 4 5 6 7 8 9 10

For this, Anna uses a 100-number grid. 11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
To subtract numbers on a number grid, she finds
the bigger number first, that is, 56 then moves 31 32 33 34 35 36 37 38 39 40

upward 2 rows (– 20) and reaches up to 36. 41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
From 36, she moves left 4 boxes (– 4). She 61 62 63 64 65 66 67 68 69 70
reaches finally to 32. Hence, 56 – 24 = 32.
71 72 73 74 75 76 77 78 79 80

32 33 34 35 36 81 82 83 84 85 86 87 88 89 90
–1 –1 –1 –1 91 92 93 94 95 96 97 98 99 100
–10
Remember 46
On a number grid, to subtract ones, we Quick Check
move leftward and to subtract tens, we –10 Use the number grid to subtract.
move upward.
56 1. 26 – 4 =

Thus, Anna has left 32 pies. 2. 58 – 17 =

Practice Time 3A

1. Fill in the blanks.

(a) 22 – 0 = (b) 31 – = 31 (c) 67 – 67 =

(d) 93 – = 0 (e) 57 – 1 = (f) 88 – = 87

54 Mathematics-2