Download Subtract 4-Digit Numbers

NS 2.1
Find the sum or difference of two whole numbers
between 0 and 10,000.
UNDERLYING SKILLS AND CONCEPTS:
subtraction basic facts; compare
numbers; regroup tens and ones;
regroup hundreds and tens
Subtract 4-Digit Numbers
Use place value to subtract larger numbers.
a
K
ey Ide
Remember: Compare the digits in each place value to decide
when to regroup. If the first digit is less than the second digit,
you need to regroup from the next higher place value.
E x am p l E
Solution: 6,725 2,348 = 4,377
page 88
And this way,
you can subtract
numbers as
big as
you want!
Chapter 8 – Lesson 2
C – © CSL Associates, Inc. All rights reserved.
Solve 6,725 2,348.
Name
P RAC T I C E
Write each problem vertically. Subtract.
1. 3,254 2,169
2. 7,426 3,275
Solve.
3.
9, 3
6, 4
4.
7
2
8, 5
1, 4
2
9
4
7
6
3
7.
6.
C – © CSL Associates, Inc. All rights reserved.
5.
5, 2
2, 7
Math
Reasoning
5
8
1
4
6, 4
4, 7
9
6
3
7
4, 6
2, 3
1
7
8
2
8.
7, 4
3, 8
7
5
2
9
Number Sense
MR 2.3
9. Is the difference of 6,237 and 2,781 more or less than 4,000?
Explain how you can decide without finding the exact answer.
Less. Possible explanation:
6,000 3,000 3,000. If you round to the nearest
hundred, you round to 6,200 and 2,800.
Then the difference is about 3,400.
Chapter 8 – Lesson 2
page 89
MCX94.HW.CL.G3.FM&Lesson.v211
8/3/04
13:56
Page 60
Name
…at home!
P RAC T I C E
Write each problem vertically. Subtract.
1. 2,143 1,058
2. 6,315 2,164
8, 2
5, 3
4.
6
1
7, 4
1, 3
1
8
6.
5.
3
6
5
2
7.
5, 1
2, 6
Math
Reasoning
6
7
2
3
5, 3 8
3, 6 5
2
6
3, 5
1, 4
7
3
8.
7, 3
3, 7
6
8
4
6
1
5
Number Sense
MR 2.3
9. Is the difference of 5,162 and 1,974 more or less than 4,000?
Explain how you can decide without finding the exact answer.
Less. Possible explanation:
5,000 2,000 3,000. If you round to the nearest
hundred, you round to 5,200 and 2,000.
Then the difference is about 3,200.
page 60
Home Resource and Homework
Chapter 8 Lesson 2
C – © CSL Associates, Inc. All rights reserved.
Solve.
3.
MCX94TEG3Ch01_32.v8.9.3 2/21/01 14:45 Page 165
Name
P RAC T I C E
Write each problem vertically. Subtract.
1. 3,254 2,169
2. 7,426 3,275
3 12
1 14 14
3 2 5 4
2 1 6 9
1 0 8 5
Solve.
3.
8 13 6 12
9, 3 7 2
6, 4 2 9
4.
C – © CSL Associates, Inc. All rights reserved.
6.
4 11 14 11
5, 2
2, 7
5
8
1
4
2, 4 6 7
Math
Reasoning
5.
4 14
8, 5
1, 4
2, 9 4 3
7 4 2 6
3 2 7 5
4 1 5 1
4
7
6, 4
4, 7
6
3
7, 0 7 3
7.
6 14 6 12
7, 4
3, 8
7
5
2
9
3, 6 1 3
5 14 8 13
9
6
3
7
1, 7 2 6
8.
5 11
4, 6
2, 3
1
7
8
2
2, 2 4 6
Number Sense
MR 2.3
9. Is the difference of 6,237 and 2,781 more or less than 4,000?
Explain how you can decide without finding the exact answer.
Less. Possible explanation:
6,000 3,000 3,000. If you round to the nearest
hundred, you round to 6,200 and 2,800.
Then the difference is about 3,400.
Chapter 8 – Lesson 2
Student Book Page
page 89
Name
…at home!
P RAC T I C E
Write each problem vertically. Subtract.
Solve.
3.
0 13
2 1 4
1 0 5
1 0 8
13
3
8
5
7 12 5 11
8, 2
5, 3
6
1
2. 6,315 2,164
4.
4 10 15 12
5, 1
2, 6
6
7
2
3
2, 4 8 9
Math
Reasoning
7.
6 12 15 14
7, 3
3, 7
6
8
4
6
3, 5 7 8
4 13 7 12
5, 3 8
3, 6 5
5
2
6, 0 7 3
2, 9 4 3
6.
3
6
11
1 5
6 4
5 1
5.
3 13
7, 4
1, 3
1
8
2
6 3
2 1
4 1
2
6
1, 7 2 6
8.
4 11
3, 5
1, 4
1
5
7
3
2, 0 6 4
Number Sense
MR 2.3
9. Is the difference of 5,162 and 1,974 more or less than 4,000?
Explain how you can decide without finding the exact answer.
Less. Possible explanation:
5,000 2,000 3,000. If you round to the nearest
hundred, you round to 5,200 and 2,000.
Then the difference is about 3,200.
page 60
Home Resource and Homework
Chapter 8 Lesson 2
C – © CSL Associates, Inc. All rights reserved.
1. 2,143 1,058