40-28-(-19)+(24)-(-32)哪位数学高手给我说说 2.-2/3+(-1/6)-(-1/4)-1/2

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40-28-(-19)+(24)-(-32)哪位数学高手给我说说 2.-2/3+(-1/6)-(-1/4)-1/2
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40-28-(-19)+(24)-(-32)哪位数学高手给我说说 2.-2/3+(-1/6)-(-1/4)-1/2
40-28-(-19)+(24)-(-32)哪位数学高手给我说说 2.-2/3+(-1/6)-(-1/4)-1/2

40-28-(-19)+(24)-(-32)哪位数学高手给我说说 2.-2/3+(-1/6)-(-1/4)-1/2
记住负负得正就行了
87 -13/12

=12+19+24+32
=87
-2/3+(-1/6)-(-1/4)-1/2
=-4/6-1/6+1/4-2/4
=-5/6-1/4
=-10/12-3/12
=-13/12

1、
40-28-(-19)+(24)-(-32)
=40-28+19+24+32
=12+19+24+32
=87
2、
-2/3+(-1/6)-(-1/4)-1/2
=-2/3-1/6+1/4-1/2
=(-4/6-1/6)+(1/4-2/4)
=-5/6-1/4
=-10/12-3/12
=-13/12