【一又二分之一减二又三分之一加十四分之十三】乘以(-42)和36乘以（二十九又十八分之十七）简便运算

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(1又1/2 - 2又1/3 + 13/14) ×(-42)
= [ (1 + 1/2) - (2+1/3) + (1 - 1/14) ] × (-42)
= ( 1/2 - 1/3 - 1/14) ×(-42)
= 1/2 ×(-42) - 1/3 ×(-42) - 1/14 ×(-42)
= - 21 + 14 + 3
= - 4
36×(29又17/18)
= 36 × (30 - 1/18)
= 36×30 - 36×1/18
= 1080 - 2
= 1078