Page 116 - Start Up Mathematics_1
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2 Add the numbers and match.
Tens Ones Tens Ones
(a) 1 5 (i) nineteen (b) 2 4
+ 2 + 3
(ii)
1 7 seventeen
Tens Ones Tens Ones
(c) 7 5 (iii) twenty-seven (d) 1 1
+ 1 + 8
(iv) fifty-nine
Tens Ones Tens Ones
(e) 4 0 (v) seventy-six (f) 5 2
+ 6 + 7
(vi) forty-six
Addition of Two 2-Digit Numbers
Look at the given example.
Tens Ones
Step 1: Add the ones and write the sum under ones.
1 5
5 + 3 = 8
+ 2 3
Step 2: Add the tens and write the sum under tens.
3 8 1 + 2 = 3
3 Add the numbers.
Tens Ones Tens Ones Tens Ones
(a) 5 2 (b) 6 8 (c) 4 4
+ 1 4 + 2 1 + 3 0
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