1. (1/4+2)×1又1/3-(2/25÷0.4+1/5×3.8)
答案:1 悬赏:60
解决时间 2021-02-12 07:09
- 提问者网友:半生酒醒
- 2021-02-11 22:31
1. (1/4+2)×1又1/3-(2/25÷0.4+1/5×3.8)
最佳答案
- 二级知识专家网友:醉吻情书
- 2021-02-11 23:49
1. (1/4+2)×1又1/3-(2/25÷0.4+1/5×3.8)
=6/4×4/3-(2/25÷2/5+0.76)
=2-(1/5+0.76)
=2-0.96
=1.04
2.
2又4/9÷[(8又5/12-6.75)÷22又1/2+4又16/21×7/12]
=2又4/9÷[5/3÷45/2+25/9]
=2又4/9÷[2/27+25/9]
=22/9÷77/27
=6/7
3.
[(2.75×5/7+2又3/4÷3又1/2)×1又1/11]÷0.375
=[(2.75×5/7+2.75×2/7)×12/11]÷3/8
=[2.75×(5/7+2/7)×12/11]÷3/8
=[11/4×12/11]÷3/8
=3÷3/8
=8
4.
2²4²6²8²
━━━━━+━━━━+━━━━
1×3 3×5 5×77×9
1 1 11
=1+━━━━━+1+━━━━+1+━━━━+1+━━━━
1×33×55×77×9
=4+1/2×(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9)
=4+1/2×(1-1/9)
=4+1/2×8/9
=4+4/9
=4又4/9
=6/4×4/3-(2/25÷2/5+0.76)
=2-(1/5+0.76)
=2-0.96
=1.04
2.
2又4/9÷[(8又5/12-6.75)÷22又1/2+4又16/21×7/12]
=2又4/9÷[5/3÷45/2+25/9]
=2又4/9÷[2/27+25/9]
=22/9÷77/27
=6/7
3.
[(2.75×5/7+2又3/4÷3又1/2)×1又1/11]÷0.375
=[(2.75×5/7+2.75×2/7)×12/11]÷3/8
=[2.75×(5/7+2/7)×12/11]÷3/8
=[11/4×12/11]÷3/8
=3÷3/8
=8
4.
2²4²6²8²
━━━━━+━━━━+━━━━
1×3 3×5 5×77×9
1 1 11
=1+━━━━━+1+━━━━+1+━━━━+1+━━━━
1×33×55×77×9
=4+1/2×(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9)
=4+1/2×(1-1/9)
=4+1/2×8/9
=4+4/9
=4又4/9
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