1. 找朋友。(把得数相同的算式用线连起来)

答案:
2. 看图列式计算。
(1)

$□ + □ = □$
(2)

$□ - □ = □$
(1)
$□ + □ = □$
(2)
$□ - □ = □$
答案:
(1)1+4=5
(2)5-2=3
(1)1+4=5
(2)5-2=3
3. 在$◯$里填上“+”或“-”。
$5◯ 2 = 3$ $4◯ 3 = 1$ $1◯ 3 = 4$ $2◯ 3 = 5$
$2◯ 2 = 4$ $3◯ 2 = 1$ $5◯ 4 = 1$ $3◯ 1 = 2$
$5◯ 2 = 3$ $4◯ 3 = 1$ $1◯ 3 = 4$ $2◯ 3 = 5$
$2◯ 2 = 4$ $3◯ 2 = 1$ $5◯ 4 = 1$ $3◯ 1 = 2$
答案:
— — + + + — — —
4.
背后藏着几?

答案:
2 1 2
5. 写算式。(算式的得数要和车头的数相等)
(1)

(2)

(1)
(2)
答案:
(1) 1+1=2, 2+0=2
(2) 1+2=3, 3+0=3
(1) 1+1=2, 2+0=2
(2) 1+2=3, 3+0=3
查看更多完整答案,请扫码查看