Everyday Math Grade 4 – Lesson 2.9 Subtraction of Multidigit Numbers Copyright © 2010 Kelly Mott

Math Boxes Lesson 2.9 Page 49

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What number is in the ten’s place? ____________________________ hundred thousand’s place? ________________ ten million’s place? ______________________ thousand’s place? _______________________ Place Value Practice

What number is in the hundred’s place? ________________________ hundred million’s place? __________________ ten thousand’s place? ____________________ million’s place? _________________________ Place Value Practice

Value of a Number Practice 1 Problem #1: 280, 763, 741 What is the 8 worth? ___________________________ Problem#2: 856, 742, 125 What is the 1 worth? ___________________________ Problem#3: 260, 958, 403 What is the 9 worth? ___________________________ Copyright © 2010 Kelly Mott

Expanded Form Practice 1 Problem 1: 286,051,873 __________________ + __________________ + __________________ + __________________ Copyright © 2010 Kelly Mott

1.What is the maximum? _________________________________________________________ 2.What is the minimum? _________________________________________________________ 3. What is the range (maximum – minimum)? _________________________________________________________ 4. What is the mode (most frequent) ? _________________________________________________________ 5. What is the median (middle number)? _________________________________________________________ Copyright © 2010 Kelly Mott LOOK AT THE DATA:

Copyright © 2010 Kelly Mott Lesson 2.9 Three Digit Subtraction

Copyright © 2010 Kelly Mott PART 1: BORROWING FROM THE TENS

1.When we subtract, we start with the ones column …can’t be done…so we have to borrow from the tens: TensOnes Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column …can’t be done…so we have to borrow from the tens: TensOnes Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column …can’t be done…so we have to borrow from the tens: TensOnes Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column …can’t be done…so we have to borrow from the tens: TensOnes Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column …can’t be done…so we have to borrow from the tens: TensOnes Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

Does this make sense? Copyright © 2010 Kelly Mott

Practice Problems Copyright © 2010 Kelly Mott

Practice 1: Regrouping Tens to Ones A.B. Copyright © 2010 Kelly Mott --

Practice 2: Regrouping Tens to Ones C.D. Copyright © 2010 Kelly Mott --

Practice 3: Regrouping Tens to Ones E.F. Copyright © 2010 Kelly Mott --

Practice 4: Regrouping Tens to Ones G.H. Copyright © 2010 Kelly Mott --

Does this make sense? Copyright © 2010 Kelly Mott

PART 2: BORROWING FROM THE HUNDREDS

1.When we subtract, we start with the ones column. 2.4 tens - 6 tens…can’t be done …so we have to borrow from the hundreds: _Hundreds_ _Tens_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column. 2.5 tens - 8 tens…can’t be done …so we have to borrow from the hundreds: _Hundreds_ _Tens_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column. 2.5 tens - 9 tens…can’t be done …so we have to borrow from the hundreds: _Hundreds_ _Tens_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column. 2.8 tens - 9 tens…can’t be done …so we have to borrow from the hundreds: _Hundreds_ _Tens_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column. 2.2 tens - 9 tens…can’t be done …so we have to borrow from the hundreds: _Hundreds_ _Tens_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

Does this make sense? Copyright © 2010 Kelly Mott

Practice Problems Copyright © 2010 Kelly Mott

Practice 1: Regrouping Hundreds to Tens A.B. Copyright © 2010 Kelly Mott --

Practice 2: Regrouping Hundreds to Tens C.D. Copyright © 2010 Kelly Mott --

Practice 3: Regrouping Hundreds to Tens E.F. Copyright © 2010 Kelly Mott --

Practice 4: Regrouping Hundreds to Tens G.H. Copyright © 2010 Kelly Mott --

How did you do? Copyright © 2010 Kelly Mott

PART 3: BORROWING MORE THAN ONCE

1.When we subtract, we start with the ones column. 2._Hundreds_ _Tens_ _Ones_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column. 2._Hundreds_ _Tens_ _Ones_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column. 2._Hundreds_ _Tens_ _Ones_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column. 2._Hundreds_ _Tens_ _Ones_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column. 2._Hundreds_ _Tens_ _Ones_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

Does this make sense? Copyright © 2010 Kelly Mott

Practice Problems Copyright © 2010 Kelly Mott

Practice 1: Regrouping More Than Once A.B. Copyright © 2010 Kelly Mott --

Practice 2: Regrouping More Than Once C.D. Copyright © 2010 Kelly Mott --

Practice 3: Regrouping More Than Once E.F. Copyright © 2010 Kelly Mott --

Practice 4: Regrouping More Than Once G.H. Copyright © 2010 Kelly Mott --

How did you do? Copyright © 2010 Kelly Mott

PART 4: SUBTRACTION WITH ZEROS

Zero in the Ones Copyright © 2010 Kelly Mott

1.When we subtract, we start with the ones column. 2._Hundreds_ _Tens_ _Ones_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column. 2._Hundreds_ _Tens_ _Ones_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column. 2._Hundreds_ _Tens_ _Ones_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

Practice 1: Zero in the Ones A.B. Copyright © 2010 Kelly Mott --

Practice 2: Zero in the Ones C.D. Copyright © 2010 Kelly Mott --

Zero in the Hundreds Copyright © 2010 Kelly Mott

1.When we subtract, we start with the ones column. 2._Hundreds_ _Tens_ _Ones_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column. 2._Hundreds_ _Tens_ _Ones_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column. 2._Hundreds_ _Tens_ _Ones_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

Practice 1: Zero in the Tens A.B. Copyright © 2010 Kelly Mott --

Practice 2: Zero in the Tens C.D. Copyright © 2010 Kelly Mott --

More than 1 Zero Copyright © 2010 Kelly Mott

1.When we subtract, we start with the ones column. 2._Hundreds_ _Tens_ _Ones_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column. 2._Hundreds_ _Tens_ _Ones_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

1.When we subtract, we start with the ones column. 2._Hundreds_ _Tens_ _Ones_ Copyright © 2010 Kelly Mott Understanding Regrouping in Subtraction __________________

Practice 1: More than 1 Zero A.B. Copyright © 2010 Kelly Mott --

Practice 2: More than 1 Zero C.D. Copyright © 2010 Kelly Mott --

PAM Problems Copyright © 2010 Kelly Mott

1. A soccer league needed to sell 650 candles to raise enough money for new uniforms. The players already sold 315 candles. How many more do they need to sell? Question:Steps: Solve:Answer in Words: Copyright © 2010 Kelly Mott

2. Sadie drove to the beach. When she started her trip the car showed 672 miles. When she returned, she read 708 miles. How many miles did she travel? Question:Steps: Solve:Answer in Words: Copyright © 2010 Kelly Mott

3. Maria had $4.56. She earned $3.50 more. How much money does she have in all? Question:Steps: Solve:Answer in Words: Copyright © 2010 Kelly Mott

4. The pilot flew 2,859 miles in a week. The following week he flew 1,042 miles. How many miles did he fly in all? Question:Steps: Solve:Answer in Words: Copyright © 2010 Kelly Mott

How did you do? Copyright © 2010 Kelly Mott

Does this make sense? Copyright © 2010 Kelly Mott

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