计算下列各题。4/5一3/10十2/3,1一(3/4一3/8),1/2十1/4一1/6,5/6一(
计算下列各题。4/5一3/10十2/3,1一(3/4一3/8),1/2十1/4一1/6,5/6一(1/2一1/3),7/8一5/12十1/6,2/3十(1/2一1/6),...
计算下列各题。4/5一3/10十2/3,1一(3/4一3/8),1/2十1/4一1/6,5/6一(1/2一1/3),7/8一5/12十1/6,2/3十(1/2一1/6),3/4一5/8十5/6,5/9十2/3一2/5
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4/5一3/10十2/3
=(24-9+20)/30
=7/6
1一(3/4一3/8)
=1/4+3/8
=5/8
1/2十1/4一1/6
=(6+3-2)/12
=7/12
5/6一(1/2一1/3)
=5/6-1/6
=2/3
7/8一5/12十1/6
=(21-10+4)/24
=15/24
=5/8
2/3十(1/2一1/6)
=2/3+1/3
=1
3/4一5/8十5/6
=(18-15+20)/24
=23/24
5/9十2/3一2/5
=11/9-2/5
=(55-18)/45
=37/45
=(24-9+20)/30
=7/6
1一(3/4一3/8)
=1/4+3/8
=5/8
1/2十1/4一1/6
=(6+3-2)/12
=7/12
5/6一(1/2一1/3)
=5/6-1/6
=2/3
7/8一5/12十1/6
=(21-10+4)/24
=15/24
=5/8
2/3十(1/2一1/6)
=2/3+1/3
=1
3/4一5/8十5/6
=(18-15+20)/24
=23/24
5/9十2/3一2/5
=11/9-2/5
=(55-18)/45
=37/45
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