无
*注意事项:
页读起的.
:= :
×0÷ =
7×8×( + )=
8× ÷8× =
3.7-0.7×1.5-0.5=
12×( × )=
a- a× =
②x: =4: .
A组:1,6,7,12,13,18,19,
B组:2,5,8,11,14,17,20,
C组:3,4,9,10,15,16,21,
则(1)B组中一共有个自然数;(2)A组中第600个数是
微信扫码预览、分享更方便
详情