commutative property of addition

Question

((27+19)+13=27+

This is my daughters problem and i don't know to explain it to her so that she will understand on a 4th grade level

Answer 1

First do one side of  it.So add (27+19)=46   then add 46+13=59. The answer of one side is 59

59=27+

Now she need to know  what number add on 27 to make it 59

so 59-27= 32

(27+19)+13=27+32

Answer 2

how can you use the communtative  property to find 5x4

Answer 3

use the commutative property of multiplication to write an equivalent algebraic expression of 9y

Answer 4

find the sum then use the commutative property of addition to write the related addition sentence

 

 

8+5=