三题怎么做谢谢
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你好,很高兴地解答你的问题。
2019年8月27日
星期二
农历己亥猪年七月二十七
三、计算。(能简算的要简算)
8-5×7/9
=8-35/9
=72/9-35/9
=37/9
(4/5-0.6)×1/3
=4/5×1/3-0.6×1/3
=4/5×1/3-3/5×1/3
=4/15-1/5
=4/15-3/15
=1/15
2/13×3/4×26
=3/4×(2/13×26)
=3/4×4
=3
3/8×79/75×24×25
=79/75×(3/8×24)×25
=79/75×9×25
=79/75×(10-1)×25
=79/75×【10×25-1×25】
=79/75×(250-25)
=79/75×225
=790/3-79/3
=711/3
=237
5/7×5/8+5/7×3/8
=5/7×(5/8+3/8)
=5/7×1
=5/7
5/7-5/7×4/9
=(1-4/9)×5/7
=5/9×5/7
=25/63
(1/3+1/4+1/6)×24
=1/3×24+1/4×24+1/6×24
=8+6+4
=8+(6+4)
=8+10
=18
101×4/5
=(100+1)×4/5
=100×4/5+1×4/5
=80+0.8
=80.8
(2/9+3/7)×7×9
=(7×9)×(2/9+3/7)
=63×(2/9+3/7)
=63×2/9+63×3/7
=14+27
=41
75×73/74
=(74+1)×73/74
=74×73/74+1×73/74
=73+73/74
=73又73/74
7/10×101×7/10
=101×(7/10×7/10)
=101×49/100
=(100+1)×49/100
=100×49/100+1×49/100
=49+49/100
=49又49/100
=49.49
26×4/27
=(27-1)×4/27
=27×4/27-1×4/27
=4-4/27
=3又23/27
2019年8月27日
星期二
农历己亥猪年七月二十七
三、计算。(能简算的要简算)
8-5×7/9
=8-35/9
=72/9-35/9
=37/9
(4/5-0.6)×1/3
=4/5×1/3-0.6×1/3
=4/5×1/3-3/5×1/3
=4/15-1/5
=4/15-3/15
=1/15
2/13×3/4×26
=3/4×(2/13×26)
=3/4×4
=3
3/8×79/75×24×25
=79/75×(3/8×24)×25
=79/75×9×25
=79/75×(10-1)×25
=79/75×【10×25-1×25】
=79/75×(250-25)
=79/75×225
=790/3-79/3
=711/3
=237
5/7×5/8+5/7×3/8
=5/7×(5/8+3/8)
=5/7×1
=5/7
5/7-5/7×4/9
=(1-4/9)×5/7
=5/9×5/7
=25/63
(1/3+1/4+1/6)×24
=1/3×24+1/4×24+1/6×24
=8+6+4
=8+(6+4)
=8+10
=18
101×4/5
=(100+1)×4/5
=100×4/5+1×4/5
=80+0.8
=80.8
(2/9+3/7)×7×9
=(7×9)×(2/9+3/7)
=63×(2/9+3/7)
=63×2/9+63×3/7
=14+27
=41
75×73/74
=(74+1)×73/74
=74×73/74+1×73/74
=73+73/74
=73又73/74
7/10×101×7/10
=101×(7/10×7/10)
=101×49/100
=(100+1)×49/100
=100×49/100+1×49/100
=49+49/100
=49又49/100
=49.49
26×4/27
=(27-1)×4/27
=27×4/27-1×4/27
=4-4/27
=3又23/27
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