  MathScore EduFighter is one of the best math games on the Internet today. You can start playing for free!

## 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.

See some of our other supported math practice problems.

### 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

1.
 86- 51
Estimate
2.
 80- 60
Estimate

### 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

1.
 103- 47
Estimate
2.
 143- 68
Estimate

### 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

1.
 292- 127
Estimate
2.
 270- 121
Estimate

### 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

1.
 772- 348
Estimate
2.
 929- 419
Estimate

### 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

1.
 784- 320
Estimate
2.
 1249- 598
Estimate

### 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

1.
 8552- 4349
Estimate
2.
 7600- 3744
Estimate

### 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

1.
 14649- 5651
Estimate
2.
 14637- 7671
Estimate

### 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

1.
 29661- 14893
Estimate
2.
 31315- 12688
Estimate

### 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

1.
 100481- 38521
Estimate
2.
 124456- 65500
Estimate

### 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

1
 86- 51
Estimate
Solution
To get the estimated answer, estimate each operand.
86 => 90
51 => 50
90 - 50 = 40

86 => 86
51 => 51
86 - 51 = 35

2
 80- 60
Estimate
Solution
To get the estimated answer, estimate each operand.
80 => 80
60 => 60
80 - 60 = 20

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

1
 103- 47
Estimate
Solution
To get the estimated answer, estimate each operand.
103 => 100
47 => 50
100 - 50 = 50

103 => 100
47 => 50
100 - 50 = 50

2
 143- 68
Estimate
Solution
To get the estimated answer, estimate each operand.
143 => 140
68 => 70
140 - 70 = 70

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

1
 292- 127
Estimate
Solution
To get the estimated answer, estimate each operand.
292 => 300
127 => 100
300 - 100 = 200

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

2
 270- 121
Estimate
Solution
To get the estimated answer, estimate each operand.
270 => 300
121 => 100
300 - 100 = 200

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

1
 772- 348
Estimate
Solution
To get the estimated answer, estimate each operand.
772 => 800
348 => 300
800 - 300 = 500

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

2
 929- 419
Estimate
Solution
To get the estimated answer, estimate each operand.
929 => 900
419 => 400
900 - 400 = 500

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

1
 784- 320
Estimate
Solution
To get the estimated answer, estimate each operand.
784 => 800
320 => 300
800 - 300 = 500

784 => 780
320 => 320
780 - 320 = 460

2
 1249- 598
Estimate
Solution
To get the estimated answer, estimate each operand.
1249 => 1200
598 => 600
1200 - 600 = 600

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

1
 8552- 4349
Estimate
Solution
To get the estimated answer, estimate each operand.
8552 => 9000
4349 => 4000
9000 - 4000 = 5000

8552 => 8600
4349 => 4300
8600 - 4300 = 4300

2
 7600- 3744
Estimate
Solution
To get the estimated answer, estimate each operand.
7600 => 8000
3744 => 4000
8000 - 4000 = 4000

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

1
 14649- 5651
Estimate
Solution
To get the estimated answer, estimate each operand.
14649 => 15000
5651 => 6000
15000 - 6000 = 9000

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

2
 14637- 7671
Estimate
Solution
To get the estimated answer, estimate each operand.
14637 => 15000
7671 => 8000
15000 - 8000 = 7000

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

1
 29661- 14893
Estimate
Solution
To get the estimated answer, estimate each operand.
29661 => 30000
14893 => 10000
30000 - 10000 = 20000

29661 => 30000
14893 => 15000
30000 - 15000 = 15000

2
 31315- 12688
Estimate
Solution
To get the estimated answer, estimate each operand.
31315 => 30000
12688 => 10000
30000 - 10000 = 20000

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

1
 100481- 38521
Estimate
Solution
To get the estimated answer, estimate each operand.
100481 => 100000
38521 => 40000
100000 - 40000 = 60000

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

2
 124456- 65500
Estimate
Solution
To get the estimated answer, estimate each operand.
124456 => 120000
65500 => 70000
120000 - 70000 = 50000   