4/9×3/5-1/5
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4/9×3/5-1/54/9×3/5-1/54/9×3/5-1/54/9×3/5-1/5=4/15-3/15=1/151/154/15-1/5=4/15-3/15=1/154/9×3/5-1/5=2/
4/9×3/5-1/5
4/9×3/5-1/5
4/9×3/5-1/5
4/9×3/5-1/5
=4/15-3/15
=1/15
1/15
4/15-1/5=4/15-3/15=1/15
4/9×3/5-1/5
=2/3×1/5-1/5
=(2/3-1)×1/5
=-1/3×1/5
=-1/15
计算题?
1╱15
1/15
15
十五分之一
1/15
4/9×3/5-1/5==56.05
7/45
收起
1/15
45分之3,即15分之1
=12/45-1/5
=3/45
=1/15
简单,原式=12/45-1/5=4/15-1/5=4/15-3/15=1/15
4/9×3/5-1/5
5/9×3/4+5/9×1/4 简便计算
5/9÷[4/5÷(3/5-1/4)]
简便计算 5,3×5,9+4,1×5,3
3+5+9+5+4+1+5等于几
3/10×1/4×5/9 算式
1+3+8+4+9+5+6
4/9+1/3+5/6
:1,3,4,5,9,( ),23,( )
5/9+(3/4-1/2)
1+2+3+5+4+6+9
从+,-,×,÷,【】中选去适当的符号添在等号左边,使等式成立5 5 5 5 5 =1 5 5 5 5 5 =3 9 9 9 9 9 =3 5 5 5 5 5 =2 5 5 5 5 5 =4 9 9 9 9 9 =20应该是9 9 9 9 9 =17
5+1+2+1+3+9+8+4+5
-5+9-4-3
5/6+27+5/9+1/6+1/7+3/7+5/9+4/7+2/5+4/9+4/5+1/5+2/9=?
4.75-5/9+5.24-4/9 (5/12+4/9+1/3)/1/36 简算
脱式计算 2/3+5/9-2/3+5/9 3/9-(1/4-1/9)-3/4
1/5+2/9×3/10+4/5简算