Math Practice Problems - Estimated Subtraction

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Estimated Subtraction - Sample Math Practice Problems

The math problems below can be generated by MathScore.com, a math practice program for schools and individual families. References to complexity and mode refer to the overall difficulty of the problems as they appear in the main program. In the main program, all problems are automatically graded and the difficulty adapts dynamically based on performance. Answers to these sample questions appear at the bottom of the page. This page does not grade your responses.

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Complexity=100

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Complexity=200

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Complexity=700

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Complexity=1000

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Complexity=5000

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Complexity=10000

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Complexity=20000

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Complexity=100000

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Answers

Complexity=60

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Problem

Correct Answer

Your Answer

86
- 51

Estimate

Solution
To get the estimated answer, estimate each operand.
86 => 90
51 => 50
90 - 50 = 40

Alternate Answer
86 => 86
51 => 51
86 - 51 = 35

Problem

Correct Answer

Your Answer

80
- 60

Estimate

Solution
To get the estimated answer, estimate each operand.
80 => 80
60 => 60
80 - 60 = 20

Alternate Answer
80 => 80
60 => 60
80 - 60 = 20

Complexity=100

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Problem

Correct Answer

Your Answer

103
- 47

Estimate

Solution
To get the estimated answer, estimate each operand.
103 => 100
47 => 50
100 - 50 = 50

Alternate Answer
103 => 100
47 => 50
100 - 50 = 50

Problem

Correct Answer

Your Answer

143
- 68

Estimate

Solution
To get the estimated answer, estimate each operand.
143 => 140
68 => 70
140 - 70 = 70

Alternate Answer
143 => 100
68 => 70
100 - 70 = 30

Complexity=200

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Problem

Correct Answer

Your Answer

292
- 127

Estimate

Solution
To get the estimated answer, estimate each operand.
292 => 300
127 => 100
300 - 100 = 200

Alternate Answer
292 => 290
127 => 130
290 - 130 = 160

Problem

Correct Answer

Your Answer

270
- 121

Estimate

Solution
To get the estimated answer, estimate each operand.
270 => 300
121 => 100
300 - 100 = 200

Alternate Answer
270 => 270
121 => 120
270 - 120 = 150

Complexity=700

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Problem

Correct Answer

Your Answer

772
- 348

Estimate

Solution
To get the estimated answer, estimate each operand.
772 => 800
348 => 300
800 - 300 = 500

Alternate Answer
772 => 770
348 => 350
770 - 350 = 420

Problem

Correct Answer

Your Answer

929
- 419

Estimate

Solution
To get the estimated answer, estimate each operand.
929 => 900
419 => 400
900 - 400 = 500

Alternate Answer
929 => 930
419 => 420
930 - 420 = 510

Complexity=1000

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Problem

Correct Answer

Your Answer

784
- 320

Estimate

Solution
To get the estimated answer, estimate each operand.
784 => 800
320 => 300
800 - 300 = 500

Alternate Answer
784 => 780
320 => 320
780 - 320 = 460

Problem

Correct Answer

Your Answer

1249
- 598

Estimate

Solution
To get the estimated answer, estimate each operand.
1249 => 1200
598 => 600
1200 - 600 = 600

Alternate Answer
1249 => 1000
598 => 600
1000 - 600 = 400

Complexity=5000

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Problem

Correct Answer

Your Answer

8552
- 4349

Estimate

Solution
To get the estimated answer, estimate each operand.
8552 => 9000
4349 => 4000
9000 - 4000 = 5000

Alternate Answer
8552 => 8600
4349 => 4300
8600 - 4300 = 4300

Problem

Correct Answer

Your Answer

7600
- 3744

Estimate

Solution
To get the estimated answer, estimate each operand.
7600 => 8000
3744 => 4000
8000 - 4000 = 4000

Alternate Answer
7600 => 7600
3744 => 3700
7600 - 3700 = 3900

Complexity=10000

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Problem

Correct Answer

Your Answer

14649
- 5651

Estimate

Solution
To get the estimated answer, estimate each operand.
14649 => 15000
5651 => 6000
15000 - 6000 = 9000

Alternate Answer
14649 => 10000
5651 => 6000
10000 - 6000 = 4000

Problem

Correct Answer

Your Answer

14637
- 7671

Estimate

Solution
To get the estimated answer, estimate each operand.
14637 => 15000
7671 => 8000
15000 - 8000 = 7000

Alternate Answer
14637 => 10000
7671 => 8000
10000 - 8000 = 2000

Complexity=20000

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Problem

Correct Answer

Your Answer

29661
- 14893

Estimate

Solution
To get the estimated answer, estimate each operand.
29661 => 30000
14893 => 10000
30000 - 10000 = 20000

Alternate Answer
29661 => 30000
14893 => 15000
30000 - 15000 = 15000

Problem

Correct Answer

Your Answer

31315
- 12688

Estimate

Solution
To get the estimated answer, estimate each operand.
31315 => 30000
12688 => 10000
30000 - 10000 = 20000

Alternate Answer
31315 => 31000
12688 => 13000
31000 - 13000 = 18000

Complexity=100000

Estimate the difference using the highest practical magnitude.
Example 1: 53 - 19 => 50 - 20
Example 2: 123 - 57 => 120 - 60
Example 3: 3898 - 2301 => 4000 - 2000

Problem

Correct Answer

Your Answer

100481
- 38521

Estimate

Solution
To get the estimated answer, estimate each operand.
100481 => 100000
38521 => 40000
100000 - 40000 = 60000

Alternate Answer
100481 => 100000
38521 => 40000
100000 - 40000 = 60000

Problem

Correct Answer

Your Answer

124456
- 65500

Estimate

Solution
To get the estimated answer, estimate each operand.
124456 => 120000
65500 => 70000
120000 - 70000 = 50000

Alternate Answer
124456 => 100000
65500 => 70000
100000 - 70000 = 30000

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