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1. $3 + 6 = $
$9 + 1 = $
9
$10 - 2 = $8
$2 + 8 = $10
$9 - 4 = $5
$9 + 1 = $
10
$8 - 4 = $4
$10 - 3 = $7
$6 + 4 = $10
答案
9 8 10 5 10 4 7 10
2. $4 + 4 - 1 = $
$2 + 6 + 1 = $
7
$10 - 6 + 5 = $9
$9 - 3 - 2 = $4
$7 - 0 + 3 = $10
$2 + 6 + 1 = $
9
$9 - 2 + 3 = $10
$6 - 2 + 3 = $7
$3 + 4 + 2 = $9
答案
7 9 4 10 9 10 7 9
3. 遮住的数是几？填一填。
$6 +$
$6 +$
4
$= 10$ 5
$+ 2 = 7$ $4 +$ 5
$= 9$6
$+ 3 = 9$ $4 +$ 1
$= 5$ $8 +$ 2
$= 10$答案
4 5 5 6 1 2
三、用下面的数写算式。
$\begin{array}{|c|c|c|c|c|c|c|c|}\hline 2 & 0 & 4 & 5 & 7 & 9 & 6 & 8 \\\hline\end{array}\\\hline $
$□ + □ = □$ $□ + □ = □$ $□ + □ = □$
$□ - □ = □$ $□ - □ = □$ $□ - □ = □$
$\begin{array}{|c|c|c|c|c|c|c|c|}\hline 2 & 0 & 4 & 5 & 7 & 9 & 6 & 8 \\\hline\end{array}\\\hline $
$□ + □ = □$ $□ + □ = □$ $□ + □ = □$
$□ - □ = □$ $□ - □ = □$ $□ - □ = □$
2+4=6 2+5=7 4+5=9 6-4=2 7-5=2 9-4=5(答案不唯一)
答案
2+4=6 2+5=7 4+5=9 6-4=2 7-5=2 9-4=5(答案不唯一)
四、画一画,填一填。
1. $〇〇〇〇$ $4 + □ = 10$
2. $\triangle$ $1 + □ = 7$
3. $□□□□□$ $5 + □ = 10$
1. $〇〇〇〇$ $4 + □ = 10$
2. $\triangle$ $1 + □ = 7$
3. $□□□□□$ $5 + □ = 10$
答案
4+6=10
@@1+6=7
@@5+5=10
@@1+6=7
@@5+5=10
