Question

Să se efectueze:
d) {345×( 21-9)÷10+24÷[68÷4-35÷5+(50-6×8)]}×2÷8=
e)36÷18+{121×3÷3+[52+24÷3×(31-4×9÷6)]+3×7}=
i) 160-2×{285÷5+30÷6×[260-(50÷25+2)×64]}

Answer 1

d) {345×(21-9)÷10+24÷[68÷4-35÷5+(50-6×8)]}×2÷8=
{345×12÷10+24÷[17-7+(50-48)]}×2÷8=
{4140÷10+24÷[17-7+2]}×2÷8=
{414+24÷12}×2÷8=
{414+2}×2÷8=
416×2÷8=
832÷8=
104

e)36÷18+{121×3÷3+[52+24÷3×(31-4×9÷6)]+3×7}=
2+{121+[52+8×(31-36÷6)]+21}=
2+{121+[52+8×(31-6)]+21}=
2+{121+[52+8×25]+21}=
2+{121+[52+200]+21}=
2+{121+252+21}=
2+394=
396

i)160-2×{285÷5+30÷6×[260-(50÷25+2)×64]}=
160-2×{57+30÷6×[260-4×64]}=
160-2×{57+30÷6×4}=
160-2×{57+5×4}=
160-2×77=
160-154=
6

Answer 2

d) {345×(21-9)÷10+24÷[68÷4-35÷5+(50-6×8)]}×2÷8=104
{345×12÷10+24÷[17-7+(50-48)]}×2÷8=104
{4140÷10+24÷[17-7+2]}×2÷8=104
{414+24÷12}×2÷8=104
{414+2}×2÷8=104
416×2÷8=104
832÷8=104

e)36÷18+{121×3÷3+[52+24÷3×(31-4×9÷6)]+3×7}=396
2+{121+[52+8×(31-36÷6)]+21}=396
2+{121+[52+8×(31-6)]+21}=396
2+{121+[52+8×25]+21}=396
2+{121+[52+200]+21}=396
2+{121+252+21}=396
2+394=396

i)160-2×{285÷5+30÷6×[260-(50÷25+2)×64]}=6
160-2×{57+30÷6×[260-4×64]}=6
160-2×{57+30÷6×4}=6
160-2×{57+5×4}=6
160-2×77=6
160-154=6