1. 圈一圈,算一算。
$16×3=$
$25×3=$
$16×3=$
48
$25×3=$
75
10
×3
=30
6
×3
=18
30
+18
=48
答案
16×3=48
10×3=30
6×3=18
30+18=48
25×3=75
20×3=60
5×3=15
60+15=75
10×3=30
6×3=18
30+18=48
25×3=75
20×3=60
5×3=15
60+15=75
2.



$18×3=$
|×|10|8|
|3|
$17×5=$
|×|10|7|
|5|
$16×8=$
|×|
|
$18×3=$
54
|×|10|8|
|3|
30
|24
|30
+24
= 54
$17×5=$
85
|×|10|7|
|5|
50
|35
|50
+35
= 85
$16×8=$
128
|×|
10
|6
||
8
|80
|48
|80
+48
= 128
答案
1. $18×3=$
| × | 10 | 8 |
| --- | --- | --- |
| 3 | 30 | 24 |
$30+24 = 54$
2. $17×5=$
| × | 10 | 7 |
| --- | --- | --- |
| 5 | 50 | 35 |
$50+35 = 85$
3. $16×8=$
| × | 10 | 6 |
| --- | --- | --- |
| 8 | 80 | 48 |
$80+48 = 128$
| × | 10 | 8 |
| --- | --- | --- |
| 3 | 30 | 24 |
$30+24 = 54$
2. $17×5=$
| × | 10 | 7 |
| --- | --- | --- |
| 5 | 50 | 35 |
$50+35 = 85$
3. $16×8=$
| × | 10 | 6 |
| --- | --- | --- |
| 8 | 80 | 48 |
$80+48 = 128$
3.
|34|2|
|11|6|
|4|21|
|12|5|
|26|3|
|7|12|
|23|4|
|18|3|

|34|2|
34×2=68
||11|6|
11×6=66
||4|21|
4×21=84
||12|5|
12×5=60
||26|3|
26×3=78
||7|12|
7×12=84
||23|4|
23×4=92
||18|3|
18×3=54
|答案
34×2=68
11×6=66
4×21=84
12×5=60
26×3=78
7×12=84
23×4=92
18×3=54
11×6=66
4×21=84
12×5=60
26×3=78
7×12=84
23×4=92
18×3=54
4. (1) 每只猴子拎了15千克水果,一共有多少千克水果?

(2) 每车装27千克西瓜,一共装多少千克西瓜?

(2) 每车装27千克西瓜,一共装多少千克西瓜?
答案
4.(1)4×15=60(千克) (2)27×3=81(千克)
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