Question

Calcula:

a) 0,39+4,2·(0,3+60·0,1)=

b) 62–3,8·(0,33+0,84:0,1)=

c) 0,2–0.8·(20+9,8:0,01)=

d) 1,4–0.4·(0,25+0,75:0,01)=

Answer 1

a) 0,39+4,2·(0,3+60·0,1)=
0,39+4,2.(0,3+6)=
0,39+4,2.6,3=
0,39+26,45=
26,84

b) 62-3,8·(0,33+0,84:0,1)=
62-3,8.(0,33+8,4)=
62-3,8.8,37=
62-31,806=
30,194

c) 0,2-0.8·(20+9,8:0,01)=
0,2-0.8.(20+0,098)=
0,2-0.8.20,098=
0,2.0.20,098=
0,2.0=
0

d) 1,4-0.4·(0,25+0,75:0,01)=
1,4-0.4.(0,25+75)=
1,4-0.4.75,25=
1,4-0.75,25=
1,4-0
1,4