6.9×1.7+2.3x4.9简便计算
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解决时间 2021-03-29 13:26
- 提问者网友：凉末
- 2021-03-29 10:09
6.9×1.7+2.3x4.9简便计算
最佳答案
- 五星知识达人网友：拾荒鲤
- 2021-03-29 11:43
6.9×1.7+2.3x4.9
=（2.3×3）×1.7+2.3×4.9
=2.3×（3×1.7）+2.3×4.9
=2.3×5.1+2.3×4.9
=2.3×（5.1+4.9）
=2.3×10
=23
=（2.3×3）×1.7+2.3×4.9
=2.3×（3×1.7）+2.3×4.9
=2.3×5.1+2.3×4.9
=2.3×（5.1+4.9）
=2.3×10
=23
全部回答
- 1楼网友：雾月
- 2021-03-29 12:51
6.9×1.7+2.3x4.9简便计算
=2.3x5.1+2.3x4.9
=2.3x(5.1+4.9)
=2.3x10
=23
=2.3x5.1+2.3x4.9
=2.3x(5.1+4.9)
=2.3x10
=23
- 2楼网友：罪歌
- 2021-03-29 12:23
6.9×1.7+2.3x4.9
=6.9×1.7+2.3x6.9 -2.3x2
=6.9x(1.7+2.3) -2.3x2
=6.9x4 -2.3x2
=2.3x12 - 2.3x2
=2.3x10
=23
=6.9×1.7+2.3x6.9 -2.3x2
=6.9x(1.7+2.3) -2.3x2
=6.9x4 -2.3x2
=2.3x12 - 2.3x2
=2.3x10
=23
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