(1.2+2.3+3.4+4.5+5.6+6.7)/(12+23+34+45+56+67)
(1.2+2.3+3.4+4.5+5.6+6.7)/(12+23+34+45+56+67)
1.2+2.3+3.4+4.5+5.6+6.7+7.8/12+23+34+45+56+67+78
必须简算(1)12+23+34+45+56+67分之 1.2+2.3+3.4+4.5+5.6+6.7(2)3.41×9.
12 +23 +34+ 45 +56+ 67 +78 +89/1.2+ 3.4 +4.5 +5.6+6.7+ 7.8 +
巧算 12加23加34加45加56加67分之1.2加2.3加3.4加4.5加5.6加6.7
计算:1.2+2.3+3.4+4.5+5.6+6.712+23+34+45+56+67.
1.2+2.3+3.4+4.5+5.612+23+34+45+56
1.2,2.3,3.4,4.5,5.6,(),( )找规律填空
简算(1-12 )×(2-23 )×(3-34 )×(4-45 )×(5- 56 )×(6- 67 )×(7-78 )×
1+12+23+34+45+56+67+78+89.+10000000
1.2.3.4.5.6.6.7.8.9.10.11.12的中位数
把1.2.3.4.5.6六个数填在口中,每个数只用一次.口十口=口十口=口十口把0.1.2.3.4.5.6.7八个数填口