17-(4/5+42×2/7)

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17-(4/5+42×2/7)17-(4/5+42×2/7)17-(4/5+42×2/7) 

17-(4/5+42×2/7)
17-(4/5+42×2/7)

17-(4/5+42×2/7)
 

17-(4/5+42×2/7) (5+7)×2+17 20/39*26/35 5/13*4/7*14 【1/7+1/6】*42 7/10*17+7/10*3 的简便运算是什么2点之前回答 简便运算:(1 16/17+2 7/13+4 5/7)÷(3/7+3/13+3/17) 1.2/(1*3)+2/(3*5)+2/(5*7)+2/(9*11)2.1/(1*3)+1/(3*5)+1/(5*7)+……+1/(97*99)3.1-(5/6)+(7/12)-(9/20)+(11/30)-(13/42)+(15/56)-(17/72)+(79/90)4.(88888888*88888888)/(1+2+3+4+5+6+7+8+7+6+5+4+3+2+1)5.(1234+4567*7890)/4568*7890-6656 1,42 2,21 3,14 4,7 找规律(1,42)(2,21 )(3,14) (4,)(5,)找规律 8题分数的计算.1.7又5/6-6又7/12+5又9/20-4又11/30+3又13/42-2又15/56+1又17/722.1+(1/1+2)+(1/1+2+3)……+(1/1+2+……+10)3.【(49/12-63/20+77/30-91/42+105/56)-3又1/6】除以1/244.(1/1*4)+(1/4*7)+(1/7*10)+(1/ (8/7,0.63,24/17) (14/29,1又8/5,2)(8/7,0.63,24/17) (14/29,1又8/5,2) (0.8,10/7,0.26,4/1,42/11)把这些从大到小排列 ①:(-17)÷(-5分之1) ②:1又4分之3÷(-1又6分之1)③:(-0.75)÷(-7分之4) ④:-3分之2÷(-3分之7)⑤:-9+5×(-6)-16÷(-8) ⑥:42×(-3分之2)-4分之3÷(-0.25) 直接得数 化简 ①根号(a+2根号ab+b)②根号(17-2根号42) ③根号(3+2根号2) ④根号(7+4根号3 化简 ①根号(a+2根号ab+b)②根号(17-2根号42) ③根号(3+2根号2) ④根号(7+4根号3 4×(-5)-4×(7-5/4)+8/17×(-17/4) 简便方法 计算2-5/12-5/18+1/12-7/18-42/17 (-18)+(+17)+(-19)+13+(-11) (-5/2)+(5/6)+(0.5)+(+7(-18)+(+17)+(-19)+13+(-11)(-5/2)+(5/6)+(0.5)+(+7/6)(+1/7)+(-4/3)+(-4/5)+(-1/7)+(+1/4)+(+4/5)|-13|+|+87|+|-23|+|-17| 数字推理题 ( ),17/14,1,5/7,2/5,1/4 连问两次.1.{(7又1/13+2.4÷6又2/5)+2又5/8}x52.{(10.75-4又11/12)x2又7/11}÷{(1.125+1/12)÷(2.25÷10又10/11)}3.1/(4x7)+1/(7x10).+1/(100x103)4.1-5/6+7/12-9/20+11/30-13/42+15/56-17/72+19/905.(46-1/7)x1 -1+2+-3+4+-5+6+-7+...+42等于多少? 3/2-5/6+7/12-9/20+11/30-15/42+15/56-17/72