Answer:
3 ( 7 + 5 ) and 21 + 15
10 ( 4 + 9 ) and 40 + 90
7 ( 3 + 5 ) and 21 + 35
4 ( 10 + 9 ) and 40 + 36
Step-by-step explanation:
You can use the distibutive property to figure this out:
3 ( 7 + 5 )
( 3 x 7 ) + ( 3 x 5 )
21 + 15
10 ( 4 + 9 )
( 10 x 4 ) + ( 10 x 9 )
40 + 90
7 ( 3 + 5 )
( 7 x 3 ) + ( 7 x 5 )
21 + 35
4 ( 10 + 9)
( 4 x 10 ) + ( 4 x 9 )
40 + 36
