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- 1.OA.D.7Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 - 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.
- 1.OA.D.8Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ - 3, 6 + 6 = _.

Equal or Not?

1st Grade Math

Â» Unit:

Understanding Equality

Big Idea:Students play an interactive game and practice crucial math fluency in this lesson on the meaning of the equals sign.

We're Tied!

1st Grade Math

Â» Unit:

Understanding Equality

Big Idea:Students apply what they learned about the inequality symbols and explore the meaning of the equal sign all while playing a fun, interactive game!

Addition and Subtraction Carnival

1st Grade Math

Â» Unit:

Working with Numbers, Operations, and Story Problems

Big Idea:So many things to do and so little time to do them in. Students will have the opportunity to challenge their addition and subtraction skills through a variety of activity choices.

Equal Amounts

2nd Grade Math

Â» Unit:

Adding and Subtracting the Basics

Big Idea:Students are expected to grasp that measuring the same object with different units can yield a different number, but represent the same quantity.

Balancing Act

1st Grade Math

Â» Unit:

Missing Parts: Unknowns in All Positions

Big Idea:Incorporate technology in this lesson! Students practice balancing equations and apply their understanding of missing parts.

Ten Apples and Bananas

1st Grade Math

Â» Unit:

Building Numbers

Big Idea:The magic spoon is back and its scooping more than last time. Students figure out the combinations of apples and bananas that I could have had on my breakfast plate.

Candy Bowl Equality

1st Grade Math

Â» Unit:

Understanding Equality

Big Idea:Students decide if two number sentences are equal using a fun, candy inspired game!

4 Square Fact or Fiction

1st Grade Math

Â» Unit:

Solving 3 Addend Problems

Big Idea:Which one of these is not like the other?! Students apply their understanding of 3 addend equations to decide which number sentence in a group of 4 is false. First person to find the false number sentence wins!

Is It True or Is It False?

1st Grade Math

Â» Unit:

The Number 10 and the Addition and Subtraction Concept

Big Idea:Understanding the meaning of the equal sign and finding missing addends to make equations true are the big ideas today. Students engage in conversation and activities to discuss their understanding and thinking.

Addition: Vocabulary Introduction

1st Grade Math

Â» Unit:

Understanding Addition

Big Idea:ADDITION...it is one of the most important concepts we need our first graders to develop in math. This lesson will begin building the foundation for strong skills in addition through the use of rich vocabulary.

Assessment: Finding Combinations for 11

1st Grade Math

Â» Unit:

Working with Numbers, Operations, and Story Problems

Big Idea:How are they progressing? Today you will find out who well your students are doing with finding as many combinations of 11 peas and carrots as they can.

Addition and Subtraction Carnival Day 2

1st Grade Math

Â» Unit:

Working with Numbers, Operations, and Story Problems

Big Idea:Why stop a good thing? Students will continue to have the opportunity to challenge their addition and subtraction skills through a variety of activity choices.

Thought Bubbles

1st Grade Math

Â» Unit:

Understanding Equality

Big Idea:Students apply what they know about the equal sign to "critique the reasoning of others" in this closing lesson!

Assessing Ability to Find Combinations of 10

1st Grade Math

Â» Unit:

The Number 10 and the Addition and Subtraction Concept

Big Idea:What's Your Number? No, we are not talking about your Sleep Number but rather how many combinations of ten your students can each find as they solve an assessment task.

Graph Party

1st Grade Math

Â» Unit:

Data and Analysis

Big Idea:It's a Graph Party and you're invited! Today the students will be involved in creating three different types of graphs and then be asked to answer questions about each representations data set.

1.OA.D.7

Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 - 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.

1.OA.D.8

Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ - 3, 6 + 6 = _.