直接写出得数。9+0= 4+0= 9-5= 9-6=
计算下面各题，能简算的要简算- (+ )+ + - (- )+ -+
直接写得数- =-=+ = 1 - =+=- =
用简便方法计算下面各题。 43.6+9.8+6.417.3× 0.25× 8 2.31×1.5+1.5×7.690.65×201
口算： 0.4×0.02= 3.5＋7.6= 1.23÷3= 2.4×2.5= 16÷1.6= 0.9÷0.01=7÷0.25= 99×0.25= 12×0.4＋0.4×13= 4×(1.5＋0.25) =
脱式计算，能简算的要简算。 2.65×1.7＋1.35×1.7 23.4÷7.8－2.1 0.75×18÷0.152.5×3.2×1.25
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