10-21.6÷6
×2.5÷×2.5
43.8-12.43-17.57
4.58×102- 45.8×0.2
+=
-=
×=
40×0.3=
12÷2.5=
3.14×9=
3.14×7=
365+199= 40÷90= 0.8÷10%= 5.98+0.2= 2.5×400=
- = ÷ = 1÷ = + = × ÷ × =
①125%×16×25% ② ③
25%×+× ×60%÷ 0.25++75%+87.5%
+×- ×101-0.6 (-20%)÷80%
……
4.6×0.32= 91.2÷7.6= 78.6÷11=(商用循环小数表示)