Decimal Multiplication Using a 10 by 10 Grid

What is the essential question of the lesson?

• What is the value of pi?

• What is the square root of 16?

• How can we use a model to multiply decimals?

• How do we add fractions?

What do columns in a grid represent?

• 1/10

• 1/2

• 1/100

• 1/1000

How many columns are shaded to represent 0.8?

• 8

• 6

• 7

• 10

What is the decimal value of each row in the grid?

• 0.01

• 0.1

• 1

• 0.001

How many squares are shaded twice when multiplying 0.7 and 0.8?

• 56

• 100

• 70

• 80

What does each square represent in a 10x10 grid?

• 1/100

• 1/10

• 1/1000

• 1/2

Why is the product of two decimals less than either factor?

• Because multiplying fractions makes the product smaller

• Because decimals are negative

• Because decimals are always less than 1

• Because of rounding errors

How many columns are shaded to represent 1.4?

• 14

• 10

• 4

• 1

How many rows are shaded to represent 0.3?

• 10

• 4

• 3

• 1

What is the product of 0.3 and 1.4?

• 1.4

• 0.3

• 0.14

• 0.42