计算下面各题，能简算的要简算．⑴0.9+1.08+0.92+0.1 ⑵32.54﹣10.46﹣4.54⑶18.73+3.85﹣2.73⑷45.6﹣（83.7﹣78.8）
直接写得数.+=-=+=++= 1-=-=+= 3--=
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) =
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