题目内容
3
∶2=6∶4，( )和( )是外项，( )和( )是内项．
答案：3,4,2,6
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口算．
|
(1) |
3 ×5= |
(2) |
5 ×5= |
|
5 ＋3= |
5 ＋5= |
||
|
(3) |
2 ×6= |
(4) |
8 ×5= |
|
6 ＋2= |
5 ＋8= |
口算．
|
(1) |
3 ×5= |
(2) |
5 ×5= |
|
5 ＋3= |
5 ＋5= |
||
|
(3) |
2 ×6= |
(4) |
8 ×5= |
|
6 ＋2= |
5 ＋8= |