1. 口算。
$9 - 3 =$
$8 - 5 =$
$9 - 8 =$
$8 - 8 =$
$9 - 7 =$
$8 - 6 =$
$8 - 7 =$
$4 + 5 =$
$1 + 8 =$
$8 - 4 =$
$9 - 2 =$
$9 - 4 =$
$8 - 2 =$
$9 - 5 =$
$2 + 6 =$
$9 - 3 =$
$8 - 5 =$
$9 - 8 =$
$8 - 8 =$
$9 - 7 =$
$8 - 6 =$
$8 - 7 =$
$4 + 5 =$
$1 + 8 =$
$8 - 4 =$
$9 - 2 =$
$9 - 4 =$
$8 - 2 =$
$9 - 5 =$
$2 + 6 =$
答案:
1. 6 3 1 0 2
2 1 9 9 4
7 5 6 4 8
2 1 9 9 4
7 5 6 4 8
2. 看图列算式。

$□ - □ = □$
$□ - □ = □$

$□ - □ = □$
$□ - □ = □$
$□ - □ = □$
$□ - □ = □$
$□ - □ = □$
$□ - □ = □$
答案:
2. 9-3=6 8-4=4 9-3=6 9-6=3
3. 先接着画一画,再写出差。

$8 - 6 = □$

$9 - 3 = □$
$8 - 6 = □$
$9 - 3 = □$
答案:
3.
2

6
3.
2
6
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