Multiplying by Tens and More Review Game

Which equation could be used to solve this problem:

Ms. Green asked for dry erase markers for Christmas and got 8 small boxes and 10 bigger boxes. Each small box had 10 dry erase markers and each bigger box had 12 dry erase markers. How many dry erase markers is that in all?

• m = 18 x 10

• m = 18 x 22

• m = (8x 12) + (10 x 10)

• m = (8 x 10) + (10 x 12)

Ms. Green asked for dry erase markers for Christmas and got 8 small boxes and 10 bigger boxes. Each small box had 10 dry erase markers and each bigger box had 12 dry erase markers. How many dry erase markers is that in all?

When we multiply 12 by 10 we do the following to get the right answer: 12 x 1 , then add zero.

• True
• False

When we multiply 12 by 10 we write a zero at the end of 12 to move the digits over one place to the left.

• True
• False

12 x 10 = 120 tens

• True
• False

12 x 10 = 10 twelves

• True
• False

25 x 10 = _______

23 x 10 = _____

10 x _____ = 140

20 x 16 = _____