5. 把5支铅笔分给小强和小明(每个人都分到),可以怎样分?

答案:
1 4 2 3 3 2 4 1
1. 连一连。

答案:
3+1连4,4-2连2,5-4连1,3+2连5;1+4连5,5-2连3,3-1连2,5-5连0。
2. 在$◯$里填上“$+$”或“$-$”。
$3◯2 = 5$ $4◯1 = 5$ $2◯1 = 1$
$3◯1 = 4$ $4◯1 = 3$ $2◯2 = 0$
$3◯2 = 5$ $4◯1 = 5$ $2◯1 = 1$
$3◯1 = 4$ $4◯1 = 3$ $2◯2 = 0$
答案:
+ + - + - -
3. 直接写得数。
$0 + 3 = □$ $2 + 1 = □$ $2 + 3 = □$
$0 + 4 = □$ $0 + 5 = □$ $0 - 0 = □$
$4 - 1 = □$ $3 - 1 = □$ $2 - 1 = □$
$3 + 1 = □$ $2 - 2 = □$ $4 - 3 = □$
$5 - 1 = □$ $3 - 2 = □$ $0 + 2 = □$
$5 - 2 = □$ $2 - 0 = □$ $1 + 3 = □$
$1 + 4 = □$ $3 + 2 = □$ $2 + 2 = □$
$0 + 3 = □$ $2 + 1 = □$ $2 + 3 = □$
$0 + 4 = □$ $0 + 5 = □$ $0 - 0 = □$
$4 - 1 = □$ $3 - 1 = □$ $2 - 1 = □$
$3 + 1 = □$ $2 - 2 = □$ $4 - 3 = □$
$5 - 1 = □$ $3 - 2 = □$ $0 + 2 = □$
$5 - 2 = □$ $2 - 0 = □$ $1 + 3 = □$
$1 + 4 = □$ $3 + 2 = □$ $2 + 2 = □$
答案:
3 3 5 4 5 0 3 2 1 4 0 1 4 1 2 3 2 4 5 4
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