计算下面各题(能简便的用简便方法) 1/5+7/15+4/15 7/10-(3/4-2/5) 1-7/15-2/5 13/15-(1/3+2/5)
1-3/10-2/55-3/7+4/723/24-1/6-3/84/9+1/10+5/91/12+3/8+11/12+5/81-(3/11-5/9)请在4天内发给我!!!...
1-3/10-2/5 5-3/7+4/7 23/24-1/6-3/8 4/9+1/10+5/9 1/12+3/8+11/12+5/8 1-(3/11-5/9)
请在4天内发给我!!! 展开
请在4天内发给我!!! 展开
4个回答
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1/5+7/15+4/15
=3/15+7/15+4/15
=14/15
7/10-(3/4-2/5)
=7/10-3/4+2/5
=14/20-15/20+8/20
=7/20
1-7/15-2/5
=1-(7/15+6/15 )
=1-13/15
=2/15
13/15-(1/3+2/5)
=13/15-5/15-6/15
=2/15
5-3/7+4/7
=5-1/7
=4又6/7
23/24-1/6-3/8
=23/24-4/24-9/24
=5/12
4/9+1/10+5/9
=4/9+5/9+1/10
=1+1/10
=1.1
1/12+3/8+11/12+5/8
=(1/12+11/12)+(3/8+5/8)
=1+1
=2
1-(3/11-5/9)
=1-27/99+55/99
=1+28/99
=1又28/99
请在4天内发给我!!!
=3/15+7/15+4/15
=14/15
7/10-(3/4-2/5)
=7/10-3/4+2/5
=14/20-15/20+8/20
=7/20
1-7/15-2/5
=1-(7/15+6/15 )
=1-13/15
=2/15
13/15-(1/3+2/5)
=13/15-5/15-6/15
=2/15
5-3/7+4/7
=5-1/7
=4又6/7
23/24-1/6-3/8
=23/24-4/24-9/24
=5/12
4/9+1/10+5/9
=4/9+5/9+1/10
=1+1/10
=1.1
1/12+3/8+11/12+5/8
=(1/12+11/12)+(3/8+5/8)
=1+1
=2
1-(3/11-5/9)
=1-27/99+55/99
=1+28/99
=1又28/99
请在4天内发给我!!!
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1-3/10-2/5=1-3/10-4/10(通分)=3/10
5-3/7+4/7=5+1/7=5又1/7(带分数)=36/7(假分数)
23/24-1/6-3/8=23/24-4/24(通分)-9/24(通分)=12/24=1/2
4/9+1/10+5/9=(4/9+5/9)+1/10=1+1/10=11/10(假分数)
1/12+3/8+11/12+5/8=(1/12+11/12 )+(3/8+5/8)=1+1=2
1-(3/11-5/9)=1-(27/99-55/99)=99/99-27/99+55/99=127/99
5-3/7+4/7=5+1/7=5又1/7(带分数)=36/7(假分数)
23/24-1/6-3/8=23/24-4/24(通分)-9/24(通分)=12/24=1/2
4/9+1/10+5/9=(4/9+5/9)+1/10=1+1/10=11/10(假分数)
1/12+3/8+11/12+5/8=(1/12+11/12 )+(3/8+5/8)=1+1=2
1-(3/11-5/9)=1-(27/99-55/99)=99/99-27/99+55/99=127/99
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你说的女孩房间时都会发生地方还是大家发挥
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