Page 57 - Math Genius C2

E:\Working\Orange_Education\Math_Genius_2\Open_Files\Chap_03
\ 26-Sep-2025 Bharat Arora Proof-10 Reader’s Sign _______________________ Date __________

2. Subtract the numbers on the number line.

(a) 22 – 16 = ________

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

(b) 30 – 20 = ________

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

(c) 19 – 0 = ________

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

(d) 39 – 23 = ________

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

ReGROUPING NUmBeRS FOR SUBTRACTION

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

to regroup the tens into ones.

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) 35 = 3 tens + 5 ones (b) 60 = 6 tens + 0 ones
= 2 tens + 1 ten + 5 ones = 5 tens + 1 ten + 0 ones

= 2 tens + 10 ones + 5 ones = 5 tens + 10 ones + 0 ones

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

Think Tank Critical Thinking
1. When 1 ten is borrowed and added to 3 ones, Math Insight
there are _____ ones. Regrouping of numbers
2. When 1 ten is borrowed and added to 5 ones, there are in subtraction is called
_____ ones. Borrowing.

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