Multiplication by Multiples of 10

Front

What is multiplication by multiples of 10?

Back

Multiplication by multiples of 10 involves multiplying a number by 10, 20, 30, etc., which can be simplified by adding a zero to the end of the number being multiplied.

Front

How do you calculate the total number of items in multiple groups?

Back

To find the total number of items in multiple groups, multiply the number of items in one group by the number of groups.

Front

If a box contains 80 plates and a restaurant buys 60 boxes, how do you find the total number of plates?

Back

Multiply the number of plates in one box (80) by the number of boxes (60): 80 x 60 = 4,800 plates.

Front

What is the result of multiplying 30 by 200?

Back

30 x 200 = 6,000.

Front

How can you simplify multiplying by 10?

Back

When multiplying by 10, simply add a zero to the end of the number. For example, 5 x 10 = 50.

Front

What is the total number of LEGOs used if there are 50 stories with 60 LEGOs each?

Back

50 x 60 = 3,000 LEGOs.

Front

If each necklace takes 100 beads and there are 50 necklaces, how many beads are needed?

Back

100 x 50 = 5,000 beads.

Front

What is the formula for finding the total when multiplying?

Back

Total = Number of items in one group x Number of groups.

Front

How do you multiply a number by 20?

Back

To multiply by 20, you can multiply the number by 2 and then add a zero. For example, 4 x 20 = (4 x 2) x 10 = 8 x 10 = 80.

Front

What is the product of 40 and 20?

Back

40 x 20 = 800.