Find the sum write the addition property yo ued 28 29 42

Find the sum. write the addition property yo ued 28 + 29 + 42 = 23 + 36 + 77 = 25 + 48 = 125 = 34 + 22 + 46 + 48 = 21 + 55 + 39 + 45 = 62 + 27 + 48 = Max spent 28 minutes on math homework, 27 minutes on homework, and 22 minutes on English homework. How much did he spend on homework?

Solution

Associative Property: When three or more numbers are added, the sum is the same regardless of the grouping of the addends

a) 28 +29 +42

= (29+42) +28

= 71 +28 = 99  

Associative Property

b) 23 +36 +77

= (36 +77) +23

= 113 +23 =136

Associative Property

c) 25 +48 +125

= (48 +125) +25

= 173 +25

= 198

Associative Property

d) 34 +22 + 46 + 48

= (46 +48) +( 34+22)

= 94 + 66

=160

Associative Property