Add Decimals using Place Value Strategies

Examples, solutions, videos and lessons to help Grade 5 students learn how to add decimals using place value strategies and relate those strategies to a written method.

New York State Common Core Math Grade 5, Module 1, Lesson 9
Worksheets for Grade 5

Lesson 9 Concept Development
Problems 1–3
2 tenths + 6 tenths
2 ones 3 thousandths + 6 ones 1 thousandth
2 tenths 5 thousandths + 6 hundredths

Problems 4–6
1.8 + 13 tenths
1 hundred 8 hundredths + 2 ones 4 hundredths
148 thousandths + 7 ones 13 thousandths

Problems 7–9
0.74 + 0.59
7.048 + 5.196
7.44 + 0.774

Lesson 9 Homework

1. Solve.
   a. 3 tenths + 4 tenths = _____ tenths
   b. 12 tenths + 9 tenths = _____ tenths = _____ one(s) _____ tenth(s)

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Lesson 9 Homework

1. Solve.
   d. 27 hundredths + 7 hundredths = __ hundredths = __ tenths __ hundredths
   
2. Solve using the standard algorithm.
   e. 72.564 + 5.137 =

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3. Walkway Over the Hudson, a bridge that crosses the Hudson River in Poughkeepsie, is 2.063 kilometers. Anping Bridge, which was built in China 850 years ago, is 2.07 kilometers long.
   a. Which bridge is longer? How much longer? Show your thinking.

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Try out our new and fun Fraction Concoction Game.

Add and subtract fractions to make exciting fraction concoctions following a recipe. There are four levels of difficulty: Easy, medium, hard and insane. Practice the basics of fraction addition and subtraction or challenge yourself with the insane level.

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