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Multiply and Divide 7's using Number Bonds




 

Videos and solutions to help Grade 3 students learn how to count by units of 7 to multiply and divide using number bonds to decompose.

Common Core Standards: 3.OA.3, 3.OA.4, 3.OA.5, 3.OA.7, 3.OA.9, 3.OA.1, 3.OA.2, 3.OA.6

Related Topics:
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 3, Grade 3, Lesson 5

Application Problem

Gracie draws 7 rows of stars. In each row, she draws 4 stars. How many stars does Gracie draw in all? Use a letter to represent the unknown and solve.

Note: This problem reviews the G3–M1 concept of multiplying using units of 4. It will be used in the Concept Development to lead into skip-counting by sevens. Be sure to circulate and find a student’s work to be used as an example in the Concept Development (find a student who counted by four 7 times to solve the problem).

Concept Development

Part 1: Use number bonds to decompose and make ten as a strategy for skip-counting units of 7.

Part 2: Skip-count by seven to solve multiplication and division problems.

Count by units of 7 to multiply and divide using number bonds to decompose.
Number bonds to decompose numbers for skip counting
Skip-count by seven 4 times.



Lesson 5 Homework

1. Use number bonds to help you skip-count by seven by making ten or adding to the ones.
2. Skip-count by seven to fill in the blanks. Then use the multiplication equation to write the related division fact directly to the right.

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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