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Decompose Once to Subtract

Videos to help Grade 3 students learn how to decompose once to subtract measurements including three-digit minuends with zeros in the tens and ones places.

Common Core Standards: 3.NBT.2, 3.NBT.1, 3.MD.1, 3.MD.2

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Lesson Plans and Worksheets for Grade 3

Lesson Plans and Worksheets for all Grades

More Lessons for Grade 3

Common Core For Grade 3

New York State Common Core Math Module 2, Grade 3, Lesson 18


1. Solve the subtraction problems below.
b. 370 L - 46 L
j. 837 km - 645 km
2. A magazine weighs 280 grams less than a newspaper. The weight of the newspaper is shown below. How much does the magazine weigh? Use a tape diagram to model your thinking.

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.

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