Page 29 - Viva

Addition of Numbers (with carry over) Top Tip
Let’s try to learn how to add numbers with carry over Carry over in
using the following examples. addition is called
regrouping.
Example 4: Add 59 and 18.

Solution: Step 1: Add the ones. T O
1
9 + 8 = 17 5 9
Since 17 is a 2-digit number, write 7 under the ones + 1 8
place and carry over 1 to the tens place.
7

T O
Step 2: Add the tens including the 1 carried over. 1

1 + 5 + 1 = 7 5 9
Write the sum under the tens place. + 1 8

So, 59 + 18 = 77. 7 7

Example 5: Add 329, 144 and 228. H T O
Solution: Step 1: Add the ones. 2

9 + 4 + 8 = 21 3 2 9

Write 1 under the ones place and carry over 2 to 1 4 4
the tens place. + 2 2 8

1

Step 2: Add the tens including the 2 carried over. H T O
1 2
2 + 2 + 4 + 2= 10 3 2 9

Write 0 under the tens place and carry over 1 to 1 4 4
the hundreds place.
+ 2 2 8

0 1

Step 3: Add the hundreds including the 1 carried over. H T O
1 2
1 + 3 + 1 + 2 = 7 3 2 9
Write 7 under the hundreds place. 1 4 4

So, 329 + 144 + 228 = 701.
+ 2 2 8

Addition Facts 7 0 1
Let’s revise the addition facts by taking bigger numbers.

• Two or more numbers can be added in any order.
For example, 246 + 132 = 378 and 132 + 246 = 378

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