问题
解答题
脱式计算下面各题.
8.9×1.1×4.7
2.7×5.4×3.9
3.6×9.85-5.46
8.05×3.4+7.6.
答案
①8.9×1.1×4.7,
=9.79×4.7,
=46.013;
②2.7×5.4×3.9,
=14.58×3.9,
=56.862;
③3.6×9.85-5.46,
=35.46-5.46,
=30;
④8.05×3.4+7.6,
=27.37+7.6,
=34.97.