数学
几道数学难题.1.12×(4/3÷8/3)2.9/2×6/1+9/2×6/5 3.8/7÷5+8/7×5/44.45×(5/2+3/10)5.12/5×6/1+12/7÷6 6.5/4÷(6/5÷12/5)7.5÷11/10×22/3 8.(2/1+3/1)×6 9.8/5×6/5×5/210.4÷5/2÷10/1 11.8/3+5/4-8/1+1.2 12.12.7×6-12.7×5+10/7 解方程:1.X-8/5=2-1.25 2.9/7=1+X-3/1 3.2/1+4.7=5+X

2019-06-25

几道数学难题.
1.12×(4/3÷8/3)2.9/2×6/1+9/2×6/5 3.8/7÷5+8/7×5/4
4.45×(5/2+3/10)5.12/5×6/1+12/7÷6 6.5/4÷(6/5÷12/5)
7.5÷11/10×22/3 8.(2/1+3/1)×6 9.8/5×6/5×5/2
10.4÷5/2÷10/1 11.8/3+5/4-8/1+1.2 12.12.7×6-12.7×5+10/7
解方程:1.X-8/5=2-1.25 2.9/7=1+X-3/1 3.2/1+4.7=5+X
优质解答
12×(4/3÷8/3)
=12×(4/3×3/8)
=12×1/2
=6
9/2×6/1+9/2×6/5
=9/2×(6/1+5/6)
=9/2
12×(4/3÷8/3)
=12×(4/3×3/8)
=12×1/2
=6
9/2×6/1+9/2×6/5
=9/2×(6/1+5/6)
=9/2
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