计算下面各题,能简算的要简算。(脱式计算) (6/35+4/21)÷4/7 2/ 50
计算下面各题,能简算的要简算。(脱式计算)(6/35+4/21)÷4/72/9÷2/7÷14/15====(5/6-3/4)÷5/12+4/53/10÷(4/5-1/2)...
计算下面各题,能简算的要简算。(脱式计算)
(6/35+4/21)÷4/7 2/9÷2/7÷14/15
= =
= =
(5/6-3/4)÷5/12+4/5 3/10÷(4/5-1/2)
= =
= =
=
2/25÷3/7+23/25÷3/7 8/9÷5/6+1/6
= =
= =
解方程。
2/3x=16 3/4x+1/4=3/8 1/5x-1/2=3/10 展开
(6/35+4/21)÷4/7 2/9÷2/7÷14/15
= =
= =
(5/6-3/4)÷5/12+4/5 3/10÷(4/5-1/2)
= =
= =
=
2/25÷3/7+23/25÷3/7 8/9÷5/6+1/6
= =
= =
解方程。
2/3x=16 3/4x+1/4=3/8 1/5x-1/2=3/10 展开
展开全部
(6/35+4/21)÷4/7
=6/35×7/4+4/21×7/4
=3/10+1/3
=9/30+10/30
=19/30
2/9÷2/7÷14/15
=2/9×7/2×15/14
=14/18×15/14
=5/6
(5/6-3/4)÷5/12+4/5
=5/6×12/5-3/4×12/5+4/5
=2-9/5+4/5
=2-13/5
=-3/5
3/10÷(4/5-1/2)
=3/10×5/4-3/10×2
=3/8-3/5
=15/40-24/40
=-9/40
2/25÷3/7+23/25÷3/7
=(2/25+23/25)÷3/7
=1×7/3
=2又1/3
8/9÷5/6+1/6
=8/9×6/5+1/6
=16/15+1/6
=32/30+5/30
=37/30
=1又7/30
2/3x=16
X=16×3/2
X=24
3/4x+1/4=3/8
3/4X=3/8-1/4
3/4X=1/8
X=1/8×4/3
X=1/6
1/5x-1/2=3/10
1/5X=1/2+3/10
1/5X=8/10
X=8/10×5
X=4
=6/35×7/4+4/21×7/4
=3/10+1/3
=9/30+10/30
=19/30
2/9÷2/7÷14/15
=2/9×7/2×15/14
=14/18×15/14
=5/6
(5/6-3/4)÷5/12+4/5
=5/6×12/5-3/4×12/5+4/5
=2-9/5+4/5
=2-13/5
=-3/5
3/10÷(4/5-1/2)
=3/10×5/4-3/10×2
=3/8-3/5
=15/40-24/40
=-9/40
2/25÷3/7+23/25÷3/7
=(2/25+23/25)÷3/7
=1×7/3
=2又1/3
8/9÷5/6+1/6
=8/9×6/5+1/6
=16/15+1/6
=32/30+5/30
=37/30
=1又7/30
2/3x=16
X=16×3/2
X=24
3/4x+1/4=3/8
3/4X=3/8-1/4
3/4X=1/8
X=1/8×4/3
X=1/6
1/5x-1/2=3/10
1/5X=1/2+3/10
1/5X=8/10
X=8/10×5
X=4
展开全部
6/35X7/4十4/2lX7/4=3/10十1/3=9/30十10/30=19/30
2/9X7/2X1/14=1/18
5/6
2/9X7/2X1/14=1/18
5/6
更多追问追答
追答
上面多数字了,下面采纳一下:
6/35X7/4十4/2lX7/4=3/10十1/3=9/30十10/30=19/30
2/9X7/2X1/14=1/18
上面多数字了,下面采纳一下:
6/35X7/4十4/2、lX7/4=3/10十1/3=9/30十10/30=19/30
2/9X7/2X1/14=1/18
5/6X12/5一3/4X12/5十4/5=2一9/5十4/5=1
3/10X5/4一3/10X2/12=3/8一3/5=15/40一24/40=一9/40
(2/25十23/25)X7/3=7/3
8/9X6/5十1/6=16/15十1/6=32/30十5/30=37/30
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