Multiply by 10
key notes :
Any time we multiply a whole number by 10 we’re gonna keep the original number and simply add a zero to the end.
1 × 10 = 10
2 × 10 = 20
3 × 10 = 30
4 × 10 = 40
5 × 10 = 50
multiplication table of 10
- 1 × 10 = 10
- 2 × 10 = 20
- 3 × 10 = 30
- 4 × 10 = 40
- 5 × 10 = 50
- 6 × 10 = 60
- 7 × 10 = 70
- 8 × 10 = 80
- 9 × 10 = 90
- 10 × 10 = 100
- 11 × 10 = 110
- 12 × 10 = 120
💡 Multiplying a number by 10 is the same as adding a number to itself 10 times.
3 x 10 = ?
To figure out the answer, we can do repeated addition:
3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 + 3 =30 😅
Learn with an example
Multiply.
4 × 10 =?
This array shows that 4 × 10 = 40. It has 4 rows with 10 dots in each row.
There are 40 dots in all.
4 × 10 = 40
Multiply.
4 × 10 =?
This number line also shows that 4 × 10 = 40. Count by 10s on the number line. Count forward 4 times.
The last arrow ends at 40.
4 × 10 = 40
Multiply.
5 × 10 =
This array shows that 5 × 10 = 50. It has 5 rows with 10 dots in each row.
There are 50 dots in all.
5 × 10 = 50
This number line also shows that 5 × 10 = 50. Count by 10s on the number line. Count forward 5 times.
The last arrow ends at 50.
5 × 10 = 50
let’s practice!
