问题
解答题
计算下面各题.
12.4×3.5×2
2.17×0.86-0.42
4.3+0.05×2.7
9.04--8.5×0.66
(4.93-0.93)×1.75
9.3×(6.2+3.8)
答案
(1)12.4×3.5×2
=12.4×(3.5×2)
=12.4×7
=86.8;
(2)2.17×0.86-0.42
=1.8662-0.42
=1.4462;
(3)4.3+0.05×2.7
=4.3+0.135
=4.435;
(4)9.04-8.5×0.66
=9.04-5.61
=3.43;
(5)(4.93-0.93)×1.75
=4×1.75
=7;
(6)9.3×(6.2+3.8)
=9.3×10
=93.