小学六年级数学题能简算的要简算
23X5/221/2-5/6X1/2(5/12-7/18)X363/4X8/9-1/37/9+7/9X85/8X7-5/8X3...
23X5/22
1/2-5/6X1/2
(5/12-7/18)X36
3/4X8/9-1/3
7/9+7/9X8
5/8X7-5/8X3 展开
1/2-5/6X1/2
(5/12-7/18)X36
3/4X8/9-1/3
7/9+7/9X8
5/8X7-5/8X3 展开
3个回答
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23X5/22
=115/22(五又二十二分之五)
1/2-5/6X1/2
=1/2×(1-5/6)
=1/2×1/6
=1/12
5/12-7/18)X36
=5/12×36-7/18×36
=15-14
=1
3/4X8/9-1/3
=2/3-1/3
=1/3
7/9+7/9X8
=7/9×(1+8)
=7/9×9
=7
5/8X7-5/8X3
=5/8×(7-3)
=5/8×4
=5/2
=2.5
=115/22(五又二十二分之五)
1/2-5/6X1/2
=1/2×(1-5/6)
=1/2×1/6
=1/12
5/12-7/18)X36
=5/12×36-7/18×36
=15-14
=1
3/4X8/9-1/3
=2/3-1/3
=1/3
7/9+7/9X8
=7/9×(1+8)
=7/9×9
=7
5/8X7-5/8X3
=5/8×(7-3)
=5/8×4
=5/2
=2.5
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2014-09-16
展开全部
23X5/22=(1+22)X5/22=5/22+5=5又5/22
1/2-5/6X1/2=(1-5/6)X1/2=1/12
(5/12-7/18)X36=5/12X36-7/18X36=15-14=1
3/4X8/9-1/3=2/3-1/3=1/3
7/9+7/9X8=7/9(1+8)=7
5/8X7-5/8X3=5/8(7-3)=5/2=2又1/2
1/2-5/6X1/2=(1-5/6)X1/2=1/12
(5/12-7/18)X36=5/12X36-7/18X36=15-14=1
3/4X8/9-1/3=2/3-1/3=1/3
7/9+7/9X8=7/9(1+8)=7
5/8X7-5/8X3=5/8(7-3)=5/2=2又1/2
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