+=
-=
×=
×2=
×13=
+ = 1- = + = - =
×0= ×9= × = × =
0.4+8.7= 4.5+3.6= 0.28+0.54= 1.4-0.9=
7.1-3.5= 5-2.7= 5.1-1.49= 15.3-4.8=
1.79+8.11= 21.5+9.5= 2.5×0.4= 2-0.01=
0.48÷0.05= 0.47÷0.001= 12.5×1.6= 0.032=
÷ = + = - = 2÷ = 1-70%=
3.14×6= 100÷12.5= 0.16÷0.4= 14÷35= 5×40%=
0.17
1.6
11.7
0.325