Page 45 - Touchpad Mathematics_Ver1.0_C4

Step 2. Add the tens and regroup. Step 3. Add the hundreds and regroup.

Th H T O Th H T O

1 1 1 1 1
7 6 5 7 6 5

+ 3 8 9 + 3 8 9

5 4 1 1 5 4

1 + 6 + 8 = 15 tens = 1 hundred 5 tens 1 + 7 + 3 = 11 hundreds
= 1 thousand 1 hundred

Write 5 in the tens place and carry over Write 1 in the hundreds place and 1 in the
1 to the hundreds column. thousands place.

Exercise 2B

1. Add:

a. 4 3 2 b. 7 3 5 c. 2 4 5 d. 5 2 3
+ 1 3 0 + 1 1 4 + 3 2 4 + 1 2 3

e. 7 0 2 f. 5 3 3 g. 2 7 2 h. 6 6 2
+ 1 0 4 + 3 4 4 + 4 0 3 + 3 2 3

2. Find the sum. (use regrouping.)

a. 3 3 7 b. 3 2 5 c. 5 6 9 d. 1 6 2
+ 4 1 6 + 4 4 9 + 3 1 9 + 2 9 4

e. 2 5 4 f. 5 7 3 g. 1 9 8 h. 2 7 6

+ 1 8 3 + 1 8 2 + 1 3 6 + 2 4 8

i. 5 6 4 j. 7 9 6 k. 5 6 4 l. 9 4 3
+ 8 3 2 + 3 4 8 + 6 4 8 + 2 9 8

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Addition