Adding Decimals with Zeros

89.34 + 98

• 100

• Apples

• 187.34

• 18734

What is the rule for adding decimals?

• Add first

• Line up the decimals first, then fill in with zeros.

• Move the decimal to the right the total amount of numbers after the decimal.

• Subtract

What is very important when you add decimals?

• just add them

• make sure the addends have the same place values

• line up the decimal point

Tom was weighing the amount of candy he received for Halloween. If he received 8.30 kg and his brother received 1.8 kg, how much candy did they get all together?

• 10.1 pounds

• 6.5 pounds

• 10.1 kg

• 6.5 kg

Ben purchased lunch today at the school cafeteria for $2.75. Before today, Ben owed $9.15 on his lunch account. What is the status of his lunch account after today?

Mathematical Equivalence

ON

5.61 + 2.4

Mathematical Equivalence

ON

Match the following

• 606.003

• 6 + 600 + 0.003

• 3.036

• 0.006 + 0.03 + 3

• 360.03

• 60 + 0.06 + 3

• 3.36

• 0.3 + 3 + 0.06

• 63.06

• 60 + 0.03 + 300

What is 78.32 + 6.784?

Mathematical Equivalence

ON

Match the following equation to the correct answer.

• 11.57

• 7.58 + 4.6

• 11.57

• 3.9 + 8.2

• 12.1

• 5.57 + 6

• 12.18

• 0.65 + 10.92

When adding or subtracting decimals, we ​ (a)   line up the decimal points.

• should

• should not