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calculați: 77+7×[7+7×(7÷7)-(77-70)];[12+3×(16÷4÷4)×3]÷7÷3;2+2×[2+2×(2+2÷2)]÷8;[(60+6÷6)×10-10]÷10-6;1000-207×3÷9+42÷6×8

Răspuns :

77+7×[7+7×(7÷7)-(77-70)]=
77+7×(7+7×1-7)=
77+7×(7+7-7)=
77+7×(14-7)=
77-7×7=
77-49=
28


[12+3×(16÷4÷4)×3]÷7÷3=
[12+3×(4÷4)×3]÷7÷3=
(12+3×1×3)÷7÷3=
(12+3×3)÷7÷3=
(12+9)÷7÷3=
21÷7÷3=
3÷3=
1


2+2×[2+2×(2+2÷2)]÷8=
2+2×[2+2×(2+1)]÷8=
2+2×(2+2×3)÷8=
2+2×(2+6)÷8=
2+2×8÷8=
2+16÷8=
2+2=
4


[(60+6÷6)×10-10]÷10-6=
[(60+1)×10-10]÷10-6=
(61×10-10)÷10-6=
(610-10)÷10-6=
600÷10-6=
60-6=
54


1000-207×3÷9+42÷6×8=
1000-621÷9+7×8=
1000-69+56=
931+56=
987