(-3又1/2)-(+5.75)+(+7又3/4)-(+12又1/4)+(-3.25)简便
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(-3又1/2)-(+5.75)+(+7又3/4)-(+12又1/4)+(-3.25)简便
(-3又1/2)-(+5.75)+(+7又3/4)-(+12又1/4)+(-3.25)
简便
(-3又1/2)-(+5.75)+(+7又3/4)-(+12又1/4)+(-3.25)简便
原式
=(-3又1/2-12又1/4-3.25)+(7又3/4-5.75)
=(-19)+2
=-17
(-3又1/2)-(+5.75)+(+7又3/4)-(+12又1/4)+(-3.25)
=-3又1/2-5.75+7又3/4-12又1/4-3.25
=-3又1/2+(7又3/4-12又1/4)-(5.75+3.25)
=-3又1/2-4又1/2-9
=-8-9
=-17
(-3又1/2)-(+5.75)+(+7又3/4)-(+12又1/4)+(-3.25)
= -3 - 1/2 - 5 - 3/4 + 7 + 3/4 - 12 - 1/4 -3 - 1/3
= -3 - 5 + 7 - 12 -3 - 1/3 - 1/4 - 1/2
= -16 - (3+4+6) / 12
= -16 - 13/12
= ...
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(-3又1/2)-(+5.75)+(+7又3/4)-(+12又1/4)+(-3.25)
= -3 - 1/2 - 5 - 3/4 + 7 + 3/4 - 12 - 1/4 -3 - 1/3
= -3 - 5 + 7 - 12 -3 - 1/3 - 1/4 - 1/2
= -16 - (3+4+6) / 12
= -16 - 13/12
= -17又12分之1
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