简便运算4.7*3.8-14.56
答案:3 悬赏:70 手机版
解决时间 2021-11-30 18:56
- 提问者网友:爱唱彩虹
- 2021-11-29 21:48
简便运算4.7*3.8-14.56
最佳答案
- 五星知识达人网友:独行浪子会拥风
- 2021-11-29 22:46
4.7*3.8-14.56
=(4+0.7)*(3+0.8)-14.56
=12+3.2+2.1+0.56-14.56
=12+3.2+2.1-14
=3.2+2.1-2
=3.2+.1
=3.3
=(4+0.7)*(3+0.8)-14.56
=12+3.2+2.1+0.56-14.56
=12+3.2+2.1-14
=3.2+2.1-2
=3.2+.1
=3.3
全部回答
- 1楼网友:雪起风沙痕
- 2021-11-30 00:38
4.7×3.8-14.56
=4.7×4-4.7×0.2-14.56
=18.8-0.94-14.56
=18.8-(0.94+14.56)
=18.8-15.5
=3.3
=4.7×4-4.7×0.2-14.56
=18.8-0.94-14.56
=18.8-(0.94+14.56)
=18.8-15.5
=3.3
- 2楼网友:人類模型
- 2021-11-30 00:23
计算下面各题,怎样简便就怎样计算
(1)4.7×3.8-14.56,
=17.86-14.56,
=3.3;
(2)3.2×9.9,
=3.2×(10-0.1),
=3.2×10-3.2×0.1,
=32-0.32,
=31.68;
(3)6.73×5.8+4.2×6.73,
=6.73×(5.8+4.2),
=6.73×10,
=67.3.
(1)4.7×3.8-14.56,
=17.86-14.56,
=3.3;
(2)3.2×9.9,
=3.2×(10-0.1),
=3.2×10-3.2×0.1,
=32-0.32,
=31.68;
(3)6.73×5.8+4.2×6.73,
=6.73×(5.8+4.2),
=6.73×10,
=67.3.
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