Question

Calculati: a) [0,8+4×(0,34×10+1,2÷2)]÷0,168; b ) 1,5×[6,4+2,2×(3,1 la puterea2 -4,61)]÷2

Answer 1

a) [0,8+4×(0,34×10+1,2÷2)]÷0,168=
[0,8+4x(3,4+0,6)]:0,168=
(0,8+4x4):0,168=
(0,8+16):0,168=
16,8:0,168=100

b ) 1,5×[6,4+2,2×(3,1 la puterea2 -4,61)]÷2=
1,5[6,4+2,2(9,61-4,61)]:2=
1,5(6,4+2,2x5):2=
1,5(6,4+11):2=
1,5x17,4:2=13,05