12÷4/5+6/7×1/3 4/7×3/10÷(1/5-1/7)(1/18+1/3-1/6)÷1/9 (0.875-5/16)×(10/9+2/3)
2个回答
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1题:12÷4/5+6/7×1/3
=12×5/4+6/7×1/3
=15+2/7
=15又2/7
2题:4/7×3/10÷(1/5-1/7)
=4/7×3/10÷(7/35-5/35)
=4/7×3/10÷2/35
=4/7×3/10×35/2
=3
3题:(1/18+1/3-1/6)÷1/9
=(1/18+6/18-3/18)×9
=(2/9)×9
=2
4题:(0.875-5/16)×(10/9+2/3)
=(7/8-5/16)×(10/9+6/9)
=(14/16-5/16)×16/9
=9/16×16/9
=1
=12×5/4+6/7×1/3
=15+2/7
=15又2/7
2题:4/7×3/10÷(1/5-1/7)
=4/7×3/10÷(7/35-5/35)
=4/7×3/10÷2/35
=4/7×3/10×35/2
=3
3题:(1/18+1/3-1/6)÷1/9
=(1/18+6/18-3/18)×9
=(2/9)×9
=2
4题:(0.875-5/16)×(10/9+2/3)
=(7/8-5/16)×(10/9+6/9)
=(14/16-5/16)×16/9
=9/16×16/9
=1
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