a. 39. 213+ 87 .39 b. 80- [ 130 - (12 - 42)]
= 39 .( 213 +87) =80-[ 130- (12- 16)
=39. 300 =80-[ 130 - (-4)]
= 11700 =80- 134= -54
a\39.213+87.39 =>=39.(213+87) =>=39.300 =11700 b\80-[130-(12-42 )] =80-[130-(12-16)] =80-[130-(-4)] =80-134 = -54
a, 39 . 213 + 87 . 39
= 39. ( 213 + 87 )
= 39 . 300
= 11 700
b, 80 - [ 130 - ( 12 - 42) ]
= 80 - [ 130 - ( 12 - 16 ) ]
= 80 - [ 130 - (-4) ]
= 80 - [ 130 + 4 ]
= 80 - 134
= -54