Post on 19-Jan-2016
transcript
Unit 5 Lesson 2Inverse Operations
Copyright © 2010 Kelly Mott
Unit 5 Lesson 2Inverse Operations
Copyright © 2010 Kelly Mott
Vocabulary
Copyright © 2010 Kelly Mott
6 ÷ 2 = 3The _____________________is the number that is divided. It represents the total number of items present.
Division Vocabulary
Copyright © 2010 Kelly Mott
6 ÷ 2 = 3Division Vocabulary
Copyright © 2010 Kelly Mott
The _____________________is the number you divide by.
6 ÷ 2 = 3Division Vocabulary
Copyright © 2010 Kelly Mott
The _____________________is the answer in division
6 ÷ 2 = 3
Dividend Quotient Divisor
LABEL THE PARTS: DRAW A LINE
Copyright © 2010 Kelly Mott
2 6The _____________________is the number that is divided. It represents the total number of items present.
3Division Vocabulary
Copyright © 2010 Kelly Mott
2 63
Division Vocabulary
Copyright © 2010 Kelly Mott
The _____________________is the number you divide by.
2 63
Division Vocabulary
Copyright © 2010 Kelly Mott
The _____________________is the answer in division.
2 6
Quotient Divisor Dividend
3
Copyright © 2010 Kelly Mott
LABEL THE PARTS: DRAW A LINE
• Multiplication and division are ____________.• You can solve division problems by using the
inverse operation.• Inverse means _________________________.
Copyright © 2010 Kelly Mott
Division Vocabulary
Inverse Operation Part 1
Copyright © 2010 Kelly Mott
Inverse Operation: Practice 1
2 4
2 14
x
x
Copyright © 2010 Kelly Mott
Inverse Operation: Practice 2
3 12
3 18
x
x
Copyright © 2010 Kelly Mott
Inverse Operation: Practice 3
4 8
4 44
x
x
Copyright © 2010 Kelly Mott
Inverse Operation: Practice 4
5 35
5 50
x
x
Copyright © 2010 Kelly Mott
Inverse Operation Part 2
Copyright © 2010 Kelly Mott
14 ÷ 2 =
Ask yourself: 2 times what = 14.
Copyright © 2010 Kelly Mott
Inverse Operation: Practice 1
18 ÷ 3 =
Ask yourself: 3 times what = 18.
Copyright © 2010 Kelly Mott
Inverse Operation: Practice 2
20 ÷ 4 =
Ask yourself: 4 times what = 20.
Copyright © 2010 Kelly Mott
Inverse Operation: Practice 3
35 ÷ 5 =
Ask yourself: 5 times what = 35.
Copyright © 2010 Kelly Mott
Inverse Operation: Practice 4
Checking Division Part 1
Copyright © 2010 Kelly Mott
Unit 5 Lesson 2: Checking Division• You can check division by using the inverse
operation ( by _____________________).
Example: Check:
2 168
Copyright © 2010 Kelly Mott
Checking Division: Practice 1
Unit 5 Lesson 2: Checking Division
Example: Check:
3 155
Copyright © 2010 Kelly Mott
Checking Division: Practice 2
Unit 5 Lesson 2: Checking Division
Example: Check:
4 246
Copyright © 2010 Kelly Mott
Checking Division: Practice 3
Unit 5 Lesson 2: Checking Division
Example: Check:
2 16
Copyright © 2010 Kelly Mott
Checking Division: Practice 4
Unit 5 Lesson 2: Checking Division
Example: Check:
4 28
Copyright © 2010 Kelly Mott
Checking Division: Practice 5
Unit 5 Lesson 2: Checking Division
Example: Check:
5 55
Copyright © 2010 Kelly Mott
Checking Division: Practice 6
Checking Division Part 2
Copyright © 2010 Kelly Mott
Example: Check:
12 ÷ 2 = 6
Copyright © 2010 Kelly Mott
Checking Division: Practice 1
Example: Check:
15 ÷ 3 = 5
Copyright © 2010 Kelly Mott
Checking Division: Practice 2
Example: Check:
32 ÷ 4 =
Copyright © 2010 Kelly Mott
Checking Division: Practice 3
Example: Check:
25 ÷ 5 =
Copyright © 2010 Kelly Mott
Checking Division: Practice 4
Example: Check:
40 ÷ 5 =
Copyright © 2010 Kelly Mott
Checking Division: Practice 5
PAM Problems
Copyright © 2010 Kelly Mott
1. Katrina writes 6 ÷ 2 = 3. What two multiplication sentences can she use to check her answer?
Question: Steps:
Solve: Answer in Words:
Copyright © 2010 Kelly Mott
2. Ramon has 8 bird s in 2 cages. Each cage has the same number of birds in it. How many birds are in each cage?
Question: Steps:
Solve: Answer in Words:
Copyright © 2010 Kelly Mott
How did you do?
Copyright © 2010 Kelly Mott
HOMEWORKMath Steps Pages: 117-118Teacher Worksheets:Re-teach Page: 90
Copyright © 2010 Kelly Mott