题目

计算下面各题,能简算的要简算. (1) 13.48+8.3﹣6.56 (2) 98×39+2×39 (3) 32.7+0.96+7.3+0.04 (4) 49.8﹣4.4﹣5.6 答案: 13.48+8.3﹣6.56 =21.78﹣6.56 =15.22 98×39+2×39 =(98+2)×39 =100×39 =3900 32.7+0.96+7.3+0.04 =(2.7+7.3)+(0.96+0.04) =10+1 =11 49.8﹣4.4﹣5.6 =49.8﹣(4.4+5.6) =49.8﹣10 =39.8
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