Page 27 - Math Skill - 2

Addition of 2-digit Numbers 25

Change the order of the addends and then find the sum.

34 + 42 37 + 52

T O T O T O T O

3 4 4 2

+ 4 2 + 3 4

Zero Property of Addition

When we add zero to a number, the sum is the number itself.

For example, 33 + 0 = 33 0 + 9 = 9

Fill in the boxes using addition facts

(a) 32 + = 32 (b) 26 + = 26 Fact-o-meter
Words such as add,
(c) + 12 = 12 (d) 51 + 0 = plus, total, increase,

sum, altogether
Word Problems indicate addition.

There are 38 books in one shelf and
34 books in the other shelf. How

many books are there in both the T O
shelves? 1

Number of books in one shelf = 38 3 8

Number of books in other shelf = 34 + 3 4

Total number of books = 38 + 34 = 72 7 2
72
Thus, ____ books are there in both
the shelves.