lesson
Finding Missing Numbers in Equations
Solve missing number problems in equations such as ? + 6 = 15 and 20 - ? = 13.
Updated 1 month ago · 5 views
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This lesson is part of a track
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Addition and Subtraction Properties and Strategies
8 lessons
Goal
Understand properties of addition and subtraction, use inverse relationships to solve missing number problems, and apply grouping strategies to add three numbers.
8 lessons
0 of 8 done
- Exploring Commutativity in AdditionUp next
- Demonstrating That Subtraction Is Not CommutativeNot started yet
- Using the Inverse Relationship to Form Fact FamiliesNot started yet
- Using Addition Facts to Solve SubtractionNot started yet
- Checking Calculations Using the Inverse OperationNot started yet
- Finding Missing Numbers in EquationsYou are here
- Adding Three One-Digit Numbers by Making TenNot started yet
- Adding Three One-Digit Numbers Using DoublesNot started yet
Learning standards covered
UK-NC-MATH-42National Curriculum (England) · Math · 1st Graderecognise and use the inverse relationship between addition and subtraction and use this to check calculations and solve missing number problems.
Open Global Standard:OGM.3.OA.2OGM.3.OA.6
UK-NC-MATH-33National Curriculum (England) · Math · 1st Gradeuse place value and number facts to solve problems.
Open Global Standard:OGM.3.NBT.1
OGM.3.OA.2OGM.3.OA.6OGM.3.NBT.1