2又3/5-7又3/4+3.75-6.2
(-4又5/8)+(-3.75)-(+2又3/8)'
(-4又5/8)+(-3.75)-(+2又3/8)
=-4-5/8-3-6/8-2-3/8
=(-4-3-2)-(5/8+6/8+3/8)
=-9-14/8
=-9-7/4
=-10-3/4
=-10.75
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(-4又5/8)+(-3.75)-(+2又3/8)+(-3又1/4)
(-4又5/8)+(-3.75)-(+2又3/8)+(-3又1/4)
=-(4又5/8+2又3/8)-(3.75+3.25)
=-7-7
=-14
(5-7又3/4)-(9-6又1/4)
(5-7又3/4)-(9-6又1/4)=5-7又3/4-9+6又1/4
=(5-9)-(7又3/4-6又1/4)
=-4-1又1/2
=-5又1/2
4又7/5-3又3/1 1又7/2-2又3/2
4又7/5-3又3/1+1又7/2-2又3/2
=(4又7/5+ 1又7/2)-(3又3/1+2又3/2)
=6-6
=0
3.75-[(-3/8)+(-1/2)-(-5/6)+4又2/3]-0.125
7又11/12
16又3/4-(3.75+2又4/13)
=16.75-(3.75+30/13)
=16.75-3.75-30/13
=13-30/13
=169/13-30/13
=139/13
=10又13分之9
4又2/3+[86-﹙﹢3又2/3﹚+﹙﹣3/5﹚]+﹙﹣2又3/5﹚
4又2/3+[86-(+3又2/3)+(-3/5)]+(-2又3/5)
=4又2/3+(86-3又2/3-3/5)-2又3/5
=4又2/3+86-3又2/3-3/5-2又3/5
=(4又2/3-3又2/3)+86-(3/5+2又3/5)
=1+86-3又1/5
=83又4/5
7又3/5×2.4+7.6×6又3/5+7又3/5
7又3/5×2.4+7.6×6又3/5+7又3/5
=7.6(2.4+6.6+1)
=7.6*10
=76
负一又1/2+3.75+5又3/4+6.5
负一又1/2+3.75+5又3/4+6.5
=(负一又1/2+6.5)+(3.75+5又3/4)
=5+9.5
=14.5