Question

(8x9-4:2)-(91-9x9)=
100-(27+7x6-48:8):7=
(4x8+3x9+21):10:(40-9x4)=
56:(100-8x5-6x5-7x3-1)=
(24+6x2):4+7-(28-12:3):6=



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Answer 1

(8x9-4:2)-(91-9x9)=(72-2)-(91-81)=70-10=60

100-(27+7x6-48:8):7=100-(27+42-6)÷7=100-63÷7=100-9=91

(4x8+3x9+21):10:(40-9x4)= (32+27+21)÷10÷(40-36)= 80÷10÷4= 8÷4=2

56:(100-8x5-6x5-7x3-1)=56÷(100-40-30-21-1)= 56÷8=7

(24+6x2):4+7-(28-12:3):6=(24+12)÷4+7-(28-4)÷6=36÷4+7-24÷6=9+7-4=12