3.(2014•南京中考)Studentsinsomejuniorschoolscan(learn)toplaytennisorbaseballinPElessons.
3. (2014 •南京中考) Students in some junior schools can (learn) to play tennis or baseball in PE lessons.
3. learn
观察下列各式:1+2+3=6=3×2,2+3+4=9=3×3,3+4+5=12=3×4,4+4+6= 2020-03-31 …
S=(1+1/1*2+(2+1/2*3)+(3+1/3*4)+...+(20+1/20*21)S= 2020-04-27 …
就几题,1.计算(x^2+5x+7)/(x+2)-(x^2+7x+11)/(x+3)2.(b^3/ 2020-04-27 …
1*2+2*3=1*(2*3)/3+3*(2*3)/3=2*3*4/31*2+2*3+3*4=2* 2020-05-13 …
3×3=9，3×3×3=27，27的个位数字是7，3×3×3×3=81，81的个位数字是1，3×3 2020-05-13 …
上面写不下,我写在下面填符号1.(1)1/2(）0.4()3/10()0.1=1(2)1/2()0 2020-05-13 …
在〇里填上适当的运算符号,使符号两边相等.3〇3〇3〇3=13〇3〇3〇3=23〇3〇3〇3在〇里 2020-07-17 …
观察各式3*1=3,3*3=9,3*3*3=27,3*3*3*3=81...观察各式3*1=3,3 2020-07-19 …
对于算式2*(3+1)*(3*3+1)*(3*3*3*3+1)*(3*3*3*3*3*3*3*3+ 2020-07-30 …
3.(2014•南京中考)Studentsinsomejuniorschoolscan(learn) 2020-10-30 …