1. 直接写出得数。
$7×8+2=$
$9×5+5=$
$9×6+6=$
$7×7+3=$
$4×6+5=$
$6×6+4=$
$12×3=$
$4×21=$
$5×11=$
$14×3=$
$4×23=$
$5×16=$
$7×8+2=$
$9×5+5=$
$9×6+6=$
$7×7+3=$
$4×6+5=$
$6×6+4=$
$12×3=$
$4×21=$
$5×11=$
$14×3=$
$4×23=$
$5×16=$
答案
7×8+2=58
9×5+5=50
9×6+6=60
7×7+3=52
4×6+5=29
6×6+4=40
12×3=36
4×21=84
5×11=55
14×3=42
4×23=92
5×16=80
9×5+5=50
9×6+6=60
7×7+3=52
4×6+5=29
6×6+4=40
12×3=36
4×21=84
5×11=55
14×3=42
4×23=92
5×16=80
2. 填一填,算一算。


答案
$600×8=4800$
$20×8=160$
$6×8=48$
$\begin{array}{r} 6\ 2\ 6\\ ×\ \ \ \ \ 8\\ \hline 5\ 0\ 0\ 8\end{array}$
$20×8=160$
$6×8=48$
$\begin{array}{r} 6\ 2\ 6\\ ×\ \ \ \ \ 8\\ \hline 5\ 0\ 0\ 8\end{array}$
3. 用竖式计算。
19×3=
73×4=
5×52=
219×3=
743×4=
5×152=
19×3=
73×4=
5×52=
219×3=
743×4=
5×152=
答案
解:
1. $19 × 3 = 57$
```
19
× 3
----
57
```
2. $73 × 4 = 292$
```
73
× 4
----
292
```
3. $5 × 52 = 260$
```
52
× 5
----
260
```
4. $219 × 3 = 657$
```
219
× 3
-----
657
```
5. $743 × 4 = 2972$
```
743
× 4
-----
2972
```
6. $5 × 152 = 760$
```
152
× 5
-----
760
```
1. $19 × 3 = 57$
```
19
× 3
----
57
```
2. $73 × 4 = 292$
```
73
× 4
----
292
```
3. $5 × 52 = 260$
```
52
× 5
----
260
```
4. $219 × 3 = 657$
```
219
× 3
-----
657
```
5. $743 × 4 = 2972$
```
743
× 4
-----
2972
```
6. $5 × 152 = 760$
```
152
× 5
-----
760
```
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