(+)×9= 1.5×100= 99×0.8+0.8= 42=
+= 7﹣= ×= ÷=
1.38﹣0.03=
÷ =
0.28× =
36×25%=
﹣ =
0.72÷0.04=
400÷25÷4=
0.3×2÷0.3×2=
13.3+6.7= 12= = 49×101≈
21×50= 12.5×8= 0.72÷0.8= =
9.7+4.2= 1.04﹣0.47= 0.25×0.8= 630+2.1=
+ = = = =
× = 4÷0.8= 3﹣ = 0.23=
÷ = 786﹣298= 25×0.7×4= 8.7+7=
( ﹣0.375)÷ = × ÷ × =
÷3= 1+40%=
:8= 0.62= 0.8×0.25= 10-0.01= ( )×0.4=1