Today we will be learning: that you can add in any order that subtraction is the inverse of addition.

Slides:

Advertisements

Similar presentations

11-3: Subtracting Integers

Advertisements

Chapter 3 Math Vocabulary

Vocabulary Chapter 6.

 Two Rules: 1. To add numbers with the same sign, ADD the absolute values and the answer has the same sign as the original numbers.  EXAMPLE:

Distance Education Mini-Lesson, Module 5 Mary C. Fanchette TEC 571 Grand Canyon University Instructor: March 23, 2011.

Solving Equations Grade 5 Math.

Easy Adding and subtracting using number bonds Mental Maths Learning Objectives I will be able to rapidly say all my number bonds to 10.

Addition and Subtraction. What words do you relate to this symbol?

SOLVING EQUATIONS BY ADDING

Inverse Operations ExpressionInverse Operation How do you get the variable by itself? x + 5 x x x ÷ 20 x3x3.

Lesson 2-2 Adding and Subtracting Rational Numbers.

Reasoning about Numbers.

Solving Equations by Adding or Subtracting Objective: Solve equations using the addition and subtraction properties of equalities.

7.8 Adding Positive and Negative Numbers Miss Hepner.

Solving Addition and Subtraction Equations Which word do you think “Equation” has a connection to?

Today we will be learning to explain the methods and reasoning used to complete calculations.

Today we will be learning: how to use a known fact to work out an unknown fact how to use doubling and halving.

By Richard Castillo. Definition The operation that reverses the effect of another operation.

Today we will be learning: different ways of making totals using odd and even numbers to investigate a general statement.

Chapter 2 Lesson 3 Subtracting Integers pgs What you will learn: Subtract Integers Evaluate expressions containing variables What you will learn:

Solve equations using addition and subtraction.

Solving Equations When do we use solving equations? We use solving equations methods when we know what the problem equals but not what the variable is.

Inverse Operations 4 th and 5 th grade. Two operations are said to be Inverse to each other if one operation undoes the effect of the other operation.

Understanding Multiplication and Division.

Today we will be learning to work out answers to calculations by using: what we already know about addition and subtraction patterns of similar calculations.

Solving Addition and Subtraction Equations Lesson 6-2 Page 225.

Solve using mental math.

By Mrs. Muller. Key Vocabulary  Equation: mathematical sentence that has an equal sign, =.  Isolate: to get it alone  Variable: a letter representing.

Transparency 2 Click the mouse button or press the Space Bar to display the answers.

Today we will be learning more about addition and subtraction.

Reverse Subtraction Objectives:  do a subtract by adding  check your answer by adding.

Applied Algebra B Lesson: 2 – 3 Adding Integers Objective: Learn to add integers.

Learning about Inverse Operations. What is the inverse of Opening the door? Turning Right? Driving Forward? The inverse undoes the original function.

Examples: = 9, so 9 – 4 = 5 3 x 4 = 12, so 12 ÷ 4 = 3

Solving Addition and Subtraction Equations An equation is a mathematical sentence that contains an equal sign.

Adding Integers. We work DOWN, not across. Additive Inverse any 2 numbers whose sum is zero opposites are additive inverses.

3. 3 Solving Equations Using Addition or Subtraction 3

Adding, Subtracting, Multiplying, and Dividing Integers

Lesson 3-4 Pages Adding Integers.

Subtracting Integers.

7-3 Solving Subtraction and Addition Equations

Warm up 11/1/ X ÷ 40.

Solving 1-Step Integer Equations

Complete the missing numbers using the inverse.

Essential Question How do I add and subtract integers?

Year 2 Autumn Term Week 9 Lesson 1

= Magic Math (Inverse Operations)

Solving Equations Grade 5 Math.

Objective translate verbal sentences into equations.

Year 2 Spring Term Week 9 Lesson 2

Year 2 Spring Term Week 3 Lesson 5

Solving 1-Step Integer Equations

Year 2 Autumn Term Week 9 Lesson 2

2-3 Subtracting Integers Course 2 Warm Up Lesson Presentation.

ONE STEP EQUATIONS Addition and Subtraction

Objective Solve one-step equations in one variable by using addition or subtraction.

L8-2 Notes: Adding Integers

Objective Solve one-step equations in one variable by using addition or subtraction.

10/3/11 In your notebook, answer completely the following:

Year 2 Autumn Term Week 9 Lesson 2

Year 2 Spring Term Week 9 Lesson 3

Year 2 Spring Term Week 9 Lesson 3

Adding & subtracting Fractions With Common denominator.

How do I solve one-step equations

Year 2 Spring Term Week 3 Lesson 5

Year 2 Spring Term Week 9 Lesson 2

Year 2 Autumn Term Week 9 Lesson 1

Presentation transcript:

Today we will be learning: that you can add in any order that subtraction is the inverse of addition.

Inverse means opposite. What does “inverse” mean?

Mental Activity We are going to practise adding numbers quickly. Add each pair of numbers as quickly as you can, then add 10 to the total.

=

=

=

=

=

10 was added to a number and the answer was 56. What was the number? was subtracted from a number and the answer was 37. What was the number? 57

50 was added to a number and the answer was 72. What was the number? was added to a number and the answer was 213. What was the number? 113

200 was subtracted from a number and the answer was 423. What was the number? was added to a number and the answer was 728. What was the number? 428

Main Activity Today we are going to work with addition and subtraction.

4 + 5 = 9 Can you use these three numbers to make another addition sentence? = 9 There are still 9 cubes in total.

9 – 5 = 4 Can you use the three numbers to make two different subtraction sentences? 9 – 4 = 5

9 – 5 = = = 9 9 – 4 = 5 Can you see a pattern?

Top Tip Subtraction is the inverse of addition. Subtraction “undoes” addition.

Group Work Complete subtraction sentences by replacing the symbols with missing numbers. Use number lines to work out unknown numbers. Use inverse operations to find missing numbers.