0.2× = ×4÷ ×4= ÷ =
16÷20%= 3.2+ - +3.2= × ×0=
10﹣5.2=
7÷=
4×0.5=
0.52÷0.42=
48÷0.04=
48×25%=
1÷1%=
3.5+6.45=
657﹣298=
2.4×=
562÷79≈
21×498≈
①+3=
②
③
④0.32=
⑤1÷0.1﹣0.1×1=
⑥0.25+0.75=
⑦8﹣0.08=
⑧621÷89=
0.8×=
5.6÷=
11﹣+=
5×0.5÷5×0.5=
7.78+2.2=
73.17÷9.12≈
0.3752=
6.3:( )=0.9
5%×10= 200×80%= 20÷20%= 1﹣75%= 2+150%=
15÷30%= 15×30%= 42÷60%= 90×4.5%= 16÷50%=
0.25×3.2= + = 0.7÷0.01= 9.04+0.6=
-0.375= 13÷91= 10÷20%= 0.81× =
62+48=
18:15和0.6:0.5 : 和 :2 0.4:0.8和0.5:0.2 16:8和1.2:0.6