五年级数，简便运算，要过程
答案:1 悬赏:70 手机版
解决时间 2021-11-13 05:33
- 提问者网友：放下
- 2021-11-12 08:26
五年级数，简便运算，要过程
最佳答案
- 五星知识达人网友：由着我着迷
- 2021-11-12 08:50
4.8x0.25
=1.2x4x0.25
=1.2x1
=1.2;
0.78x98
=0.78x100-0.78x2
=78-1.56
=76.44;
0.5x2.33x8
=0.5x8x2.33
=4x2.33
=9.32;
1.5x105
=1.5x100+1.5x5
=150+7.5
=157.5;
0.3x2.5x0.4
=0.3x1
=0.3;
1.2x2.5+0.8x2.5
=(1.2+0.8)x2.5
=2x2.5
=5.
供参考。
=1.2x4x0.25
=1.2x1
=1.2;
0.78x98
=0.78x100-0.78x2
=78-1.56
=76.44;
0.5x2.33x8
=0.5x8x2.33
=4x2.33
=9.32;
1.5x105
=1.5x100+1.5x5
=150+7.5
=157.5;
0.3x2.5x0.4
=0.3x1
=0.3;
1.2x2.5+0.8x2.5
=(1.2+0.8)x2.5
=2x2.5
=5.
供参考。
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