【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
展开全部
你好!
数学之美团为你解答
(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
数学之美团为你解答
(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
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询