Answer:
3 x 10 = 30
5 x 10 = 50
7 x 10 =70
30 is positive, 50 is positive, 70 is positive
Explanation:
When multiplying 3 by 10, imagine 10 being adding by 10 three times.
10 + 10 + 10
Then add
30
If you know even numbers they go:
2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,etc.
These steps also work for 5 x 10 and 7 x 10.
Imagine 10 being added by 10 five times.
10 + 10 + 10 + 10 + 10 = 50.
Imagine 10 being added by 10 seven times.
10 + 10 + 10 + 10 + 10 + 10 + 10 = 70.