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