简便运算1/(2*5)+1/(3*5)+1/(8*11)+……+1/(20*23)=
简便运算1/(2*5)+1/(3*5)+1/(8*11)+……+1/(20*23)=
简便运算:(2/9+1/6-5/18)*36
1/6*(5-2/3)简便运算
1/(2×5)+1/(3×5)+1/(8×11).+1/(20×23)奥数简便运算
数学简便运算:(2+4+6+8……+1996)-(1+3+5+……+1995)
1×2×3+2×3×4+3×4×5+……8×9×10 尽量简便运算)
1,(-2)+(-5)+7+(-3) 2,(-31)+(+12)+(-29)+(+8) (简便运算)
[1-0÷(4/9-7/17)]×4/5简便运算和(3/8-1/4)÷(8/9+3/4)简便运算,
(2/15+3/4+5/12)乘60简便运算 5/27乘(1/4+1/5)简便运算 7/4乘17-
23/24-(2/3+1/4)+5/6简便运算
简便运算(快哟!)1-5/6+7/12-9/20+11/30-13/42+15/56-17/42+19/90简便运算喔!
-4+(-12)+0.5+8+(-1/2)简便运算