1道计算题.(-1/2 +1/6 -3/8 +5/12)* (-24) = = =(-1/2 +1/6 -3/8 +5/12)* (-24)===

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1道计算题.(-1/2 +1/6 -3/8 +5/12)* (-24) = = =(-1/2 +1/6 -3/8 +5/12)* (-24)===
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1道计算题.(-1/2 +1/6 -3/8 +5/12)* (-24) = = =(-1/2 +1/6 -3/8 +5/12)* (-24)===
1道计算题.(-1/2 +1/6 -3/8 +5/12)* (-24) = = =
(-1/2 +1/6 -3/8 +5/12)* (-24)
=
=
=

1道计算题.(-1/2 +1/6 -3/8 +5/12)* (-24) = = =(-1/2 +1/6 -3/8 +5/12)* (-24)===
原式=(-12/24+4/24-9/24+10/24) *(-24)
=(-7/24)*(-24)
=7