Page 126 - Start Up Mathematics_1

Tens Ones
6 13 Step 2: Take 1 ten from the tens place and add it to
7 3
3 in the ones place (1 ten = 10 ones).

– 5 10 + 3 = 13

8 Now subtract 5 from 13 to get,

13 – 5 = 8

Change 7 tens to 6 tens in the tens column.

Tens Ones
6 13 Step 3: Write the remaining digit in the tens place as
7 3
it is.
– 5

6 8

Tens Ones
(b) 8 7 Step 1: Look at the digits in the ones place. 9 is

bigger than 4, so we cannot subtract them.
– 5 9

Tens Ones
7 14 Step 2: Take 1 ten from the tens place and add it to
8 4
4 in the ones place (1 ten = 10 ones).

– 5 9 10 + 4 = 14

5 Now subtract 9 from 14 to get,

14 – 9 = 5
Change 8 tens to 7 tens in the tens column.

Tens Ones
7 14 Step 3: Subtract the digit in the tens place.
8 4
7 – 5 = 2
– 5 9

2 5

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