Add and Subtract Decimals Review

The video tutorial covers converting fractions to decimals and vice versa, using models to understand decimal operations, and applying properties of addition to decimals. It explains estimation strategies, including rounding and compatible numbers, and guides on when to estimate or find exact values. The tutorial also emphasizes the importance of aligning decimals correctly and provides strategies for solving word problems involving decimals.

How do you convert a fraction with a denominator of 100 into a decimal?

• Multiply the numerator by 100

• Divide the numerator by 100

• Subtract 100 from the numerator

• Add 100 to the numerator

Which property of addition states that the order of addends can be changed without affecting the sum?

• Commutative Property

• Associative Property

• Distributive Property

• Identity Property

When rounding a decimal, what should you do if the digit to the right of your rounding place is 5 or greater?

• Add 2 to the rounding place

• Round down

• Round up

• Keep the number the same

What is the sum of compatible decimals 0.6 and 0.4?

• 1.0

• 0.8

• 1.2

• 0.9

What should you do if an estimate is close to a limit when adding decimals?

• Use the estimate

• Find an exact value

• Round the numbers again

• Ignore the limit

Why is it important to align decimal points when adding or subtracting decimals?

• To ensure the place values are correctly aligned

• To avoid using a calculator

• To make the calculation easier

• To ensure the numbers are in the correct order

Which strategy can help identify the operation needed to solve a decimal word problem?

• Using a calculator

• Identifying keywords

• Guessing the operation

• Drawing a diagram