a.(64 - 32 ) :8 = 32 : 8 = 4
b. 36 x 2 x7 + 36 x 86
= 36 x (14 + 86)
= 36 x 100
= 3600
68:8 - 32 : 8
= ( 68 - 32): 8
= 36 : 8
= 4,5
72 x 7 + 36 x 86
= 72 x 7 + 36 x 2 x 43
= 72 x 7 + 72 x 43
= 72 x ( 7 + 43)
= 72 x 50
= 3600
a) 64 : 8 - 32 : 8
=( 64 - 32 ) : 8
= 32 : 8
= 4
b. 36 x 2 x7 + 36 x 86
= 36 x (14 + 86)
= 36 x 100
= 3600