Question

Calculați: a)0,5×[4,15:0,415+0,2×(5,6-0,3×0,4)]
b)3 3/4+{1,05+[2,75-(0,31+0,44)]}:4

Answer 1

a)0,5×[4,15:0,415+0,2×(5,6-0,3×0,4)] =
=0,5×[10+0,2×(5,6-0,12)] =
=0,5×(10+0,2×5,48) =
=0,5×(10+1,096) =
=0,5×11,096 =
=5,548

b)3 3/4+{1,05+[2,75-(0,31+0,44)]}:4=
=3,75+[1,05+(2,75-0,75)]:4=
=3,75+(1,05+2):4=
=3,75+3,05:4=
=3,75+0,7625=4,5125