简便计算: (2/3+5/12)x12,5/9x(8/13x9/10), 2/9-7/16x2/9
答案:2 悬赏:20 手机版
解决时间 2021-03-17 23:54
- 提问者网友:我的未来我做主
- 2021-03-17 09:56
简便计算: (2/3+5/12)x12,5/9x(8/13x9/10), 2/9-7/16x2/9
最佳答案
- 五星知识达人网友:毛毛
- 2021-03-17 11:34
(2/3+5/12)x12
=2/3×12+5/12×12
=8+5
=13
5/9x(8/13x9/10)
=(5/9×9/10)×8/13
=1/2×8/13
=4/13
2/9-7/16x2/9
=(1-7/16)×2/9
=9/16×2/9
=1/8
11/8x4/7-0.375x4/7
=11/8×4/7-3/8×4/7
=(11/8-3/8)×4/7
=1×4/7
=4/7
=2/3×12+5/12×12
=8+5
=13
5/9x(8/13x9/10)
=(5/9×9/10)×8/13
=1/2×8/13
=4/13
2/9-7/16x2/9
=(1-7/16)×2/9
=9/16×2/9
=1/8
11/8x4/7-0.375x4/7
=11/8×4/7-3/8×4/7
=(11/8-3/8)×4/7
=1×4/7
=4/7
全部回答
- 1楼网友:西岸风
- 2021-03-17 12:17
1、原式
=12×2/3+12×5/12
=8+5
=13
2、原式
=5/9 ×9/10×8/13
=1/2×8/13
=4/l3追答3、原式
=2/9×(1-7/16)
=2/9×9/16
=1/8
4、原式
=4/7×(11/8-3/8)
=4/7
=12×2/3+12×5/12
=8+5
=13
2、原式
=5/9 ×9/10×8/13
=1/2×8/13
=4/l3追答3、原式
=2/9×(1-7/16)
=2/9×9/16
=1/8
4、原式
=4/7×(11/8-3/8)
=4/7
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