1-+=
1÷×=
0.5-+0.5-=
÷75%=
(+)×24=
7÷×7÷=
100÷50%=
10.2+80%=
0.5×0.1÷0.5=
12÷0.9≈
12÷0.03=
25×40%=
2.4-2.4×0.5=
8×5÷8×5=
6.3+3.07=
3.2÷1%=
9-9÷12=
33+42=
0.24t:1.2kg=
1.47+5.3=
0×99=
9.9÷11=
0.3×3.6=
1÷0.5=
2.8÷1.4×0.2=
-0.375=
5-=
0.32÷10%=
①2.4×5=
② ×91=
③0.42=
④1÷ ×6=
⑤6.8-0.71-1.39=
⑥2- + =
⑦ ×4÷ ×4=
⑧21×199≈
13+37=
12.5×8=
2-0.25=
612÷6=
2.5×30%+20%=
9.7+0.03= + = ×33= 0.52=
20%- = 10:0.2= 0×0.9+0.1= 43=