3x 10, then 5 x 10, then 7 x 10, then tell if it is going positive or negative

3 x 10 = 30

5 x 10 = 50

7 x 10 =70

30 is positive, 50 is positive, 70 is positive

Step-by-step 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.