(+)×6= ÷= += -= ÷21= ÷×=
= 0.4+55%= 1.5-= 62.8÷3.14=
8×0.99= 1.05÷0.15= =
92-72= 6-3.7-2.3=
①
②
③
④
÷ = ÷ = ×18= × =
- = + = 0× = ÷ =
+= 5÷= ×= ×÷=
÷3= += -= ×÷×=
×= 3.2×= ×× ×-×=
= ÷= 8÷8÷ ×5-2×=