题目

计算下面各图形的面积。 (1) (2) (3) 答案:解:20×8+20×5÷2 =160+50 =210(cm2) 答:图形的面积为210平方厘米。 解: (1+1.6)×(0.8-0.5)÷2+1×0.5 =2.6×0.3÷2+0.5 =0.39+0.5 =0.89(m2) 答:图形的面积为0.89平方米。 解:4×2.5=10(dm2) 答:图形的面积为10dm2。He__________unwisely, but he was at least trying to do something helpful.A.may have actedB.must have actedC.should actD.would act
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