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Decimal Multiplication - 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=1, Mode=1

Multiply. Sample Answers: 12.09   .76   0.76
1.  
1.7
  × 0.4
2.  
1.6
  × 1.6

Complexity=3, Mode=1

Multiply. Sample Answers: 12.09   .76   0.76
1.  
2.1
  × 2.8
2.  
3.7
  × 1

Complexity=5, Mode=1

Multiply. Sample Answers: 12.09   .76   0.76
1.  
4.4
  × 4.5
2.  
4.3
  × 5.6

Complexity=15, Mode=2

Multiply. Sample Answers: 12.09   .76   0.76
1.  
3.02
  × 14.79
2.  
14.69
  × 8.86

Complexity=20, Mode=2

Multiply. Sample Answers: 12.09   .76   0.76
1.  
9.67
  × 10.43
2.  
17.76
  × 10.23

Complexity=10, Mode=3

Multiply. Sample Answers: 12.09   .76   0.76
1.  
2.149
  × 1.144
2.  
3.628
  × 4.046

Complexity=20, Mode=4

Multiply. Sample Answers: 12.09   .76   0.76
1.  
14.465
  × 7.1704
2.  
11.7244
  × 2.9642

Complexity=50, Mode=4

Multiply. Sample Answers: 12.09   .76   0.76
1.  
38.4373
  × 24.261
2.  
8.1956
  × 38.2712

Answers

Complexity=1, Mode=1

Multiply. Sample Answers: 12.09   .76   0.76
#Correct AnswerYour Answer
1
1.7
  × 0.4
Solution
Ignore the decimals for now and multiply as usual.
    17
  × 04
    68
   00
    68
Now add the decimal point back into the answer:
1.7 has 1 digit to the right of the decimal point and 0.4 has 1 digit to the right of the decimal point .
For the answer, put the decimal point 2 (1 + 1) places to the right of the answer.
So, the final answer is 0.68.
#Correct AnswerYour Answer
2
1.6
  × 1.6
Solution
Ignore the decimals for now and multiply as usual.
    16
  × 16
    96
   16
   256
Now add the decimal point back into the answer:
1.6 has 1 digit to the right of the decimal point and 1.6 has 1 digit to the right of the decimal point .
For the answer, put the decimal point 2 (1 + 1) places to the right of the answer.
So, the final answer is 2.56.

Complexity=3, Mode=1

Multiply. Sample Answers: 12.09   .76   0.76
#Correct AnswerYour Answer
1
2.1
  × 2.8
Solution
Ignore the decimals for now and multiply as usual.
    21
  × 28
   168
   42
   588
Now add the decimal point back into the answer:
2.1 has 1 digit to the right of the decimal point and 2.8 has 1 digit to the right of the decimal point .
For the answer, put the decimal point 2 (1 + 1) places to the right of the answer.
So, the final answer is 5.88.
#Correct AnswerYour Answer
2
3.7
  × 1
Solution
Ignore the decimals for now and multiply as usual.
   37
  × 1
   37
Now add the decimal point back into the answer:
3.7 has 1 digit to the right of the decimal point and 1 has 0 digits to the right of the decimal point .
For the answer, put the decimal point 1 (1 + 0) places to the right of the answer.
So, the final answer is 3.7.

Complexity=5, Mode=1

Multiply. Sample Answers: 12.09   .76   0.76
#Correct AnswerYour Answer
1
4.4
  × 4.5
Solution
Ignore the decimals for now and multiply as usual.
    44
  × 45
   220
  176
  1980
Now add the decimal point back into the answer:
4.4 has 1 digit to the right of the decimal point and 4.5 has 1 digit to the right of the decimal point .
For the answer, put the decimal point 2 (1 + 1) places to the right of the answer.
So, the final answer is 19.8.
#Correct AnswerYour Answer
2
4.3
  × 5.6
Solution
Ignore the decimals for now and multiply as usual.
     43
   × 56
    258
   215
   2408
Now add the decimal point back into the answer:
4.3 has 1 digit to the right of the decimal point and 5.6 has 1 digit to the right of the decimal point .
For the answer, put the decimal point 2 (1 + 1) places to the right of the answer.
So, the final answer is 24.08.

Complexity=15, Mode=2

Multiply. Sample Answers: 12.09   .76   0.76
#Correct AnswerYour Answer
1
3.02
  × 14.79
Solution
Ignore the decimals for now and multiply as usual.
      302
   × 1479
     2718
    2114
   1208
   302
   446658
Now add the decimal point back into the answer:
3.02 has 2 digits to the right of the decimal point and 14.79 has 2 digits to the right of the decimal point .
For the answer, put the decimal point 4 (2 + 2) places to the right of the answer.
So, the final answer is 44.6658.
#Correct AnswerYour Answer
2
14.69
  × 8.86
Solution
Ignore the decimals for now and multiply as usual.
      1469
     × 886
      8814
    11752
   11752
   1301534
Now add the decimal point back into the answer:
14.69 has 2 digits to the right of the decimal point and 8.86 has 2 digits to the right of the decimal point .
For the answer, put the decimal point 4 (2 + 2) places to the right of the answer.
So, the final answer is 130.1534.

Complexity=20, Mode=2

Multiply. Sample Answers: 12.09   .76   0.76
#Correct AnswerYour Answer
1
9.67
  × 10.43
Solution
Ignore the decimals for now and multiply as usual.
       967
    × 1043
      2901
     3868
     000
    967
   1008581
Now add the decimal point back into the answer:
9.67 has 2 digits to the right of the decimal point and 10.43 has 2 digits to the right of the decimal point .
For the answer, put the decimal point 4 (2 + 2) places to the right of the answer.
So, the final answer is 100.8581.
#Correct AnswerYour Answer
2
17.76
  × 10.23
Solution
Ignore the decimals for now and multiply as usual.
      1776
    × 1023
      5328
     3552
    0000
   1776
   1816848
Now add the decimal point back into the answer:
17.76 has 2 digits to the right of the decimal point and 10.23 has 2 digits to the right of the decimal point .
For the answer, put the decimal point 4 (2 + 2) places to the right of the answer.
So, the final answer is 181.6848.

Complexity=10, Mode=3

Multiply. Sample Answers: 12.09   .76   0.76
#Correct AnswerYour Answer
1
2.149
  × 1.144
Solution
Ignore the decimals for now and multiply as usual.
      2149
    × 1144
      8596
     8596
    2149
   2149
   2458456
Now add the decimal point back into the answer:
2.149 has 3 digits to the right of the decimal point and 1.144 has 3 digits to the right of the decimal point .
For the answer, put the decimal point 6 (3 + 3) places to the right of the answer.
So, the final answer is 2.458456.
#Correct AnswerYour Answer
2
3.628
  × 4.046
Solution
Ignore the decimals for now and multiply as usual.
       3628
     × 4046
      21768
     14512
     0000
   14512
   14678888
Now add the decimal point back into the answer:
3.628 has 3 digits to the right of the decimal point and 4.046 has 3 digits to the right of the decimal point .
For the answer, put the decimal point 6 (3 + 3) places to the right of the answer.
So, the final answer is 14.678888.

Complexity=20, Mode=4

Multiply. Sample Answers: 12.09   .76   0.76
#Correct AnswerYour Answer
1
14.465
  × 7.1704
Solution
Ignore the decimals for now and multiply as usual.
       14465
     × 71704
       57860
      00000
    101255
    14465
  101255
  1037198360
Now add the decimal point back into the answer:
14.465 has 3 digits to the right of the decimal point and 7.1704 has 4 digits to the right of the decimal point .
For the answer, put the decimal point 7 (3 + 4) places to the right of the answer.
So, the final answer is 103.719836.
#Correct AnswerYour Answer
2
11.7244
  × 2.9642
Solution
Ignore the decimals for now and multiply as usual.
       117244
      × 29642
       234488
      468976
     703464
   1055196
   234488
   3475346648
Now add the decimal point back into the answer:
11.7244 has 4 digits to the right of the decimal point and 2.9642 has 4 digits to the right of the decimal point .
For the answer, put the decimal point 8 (4 + 4) places to the right of the answer.
So, the final answer is 34.75346648.

Complexity=50, Mode=4

Multiply. Sample Answers: 12.09   .76   0.76
#Correct AnswerYour Answer
1
38.4373
  × 24.261
Solution
Ignore the decimals for now and multiply as usual.
       384373
      × 24261
       384373
     2306238
     768746
   1537492
   768746
   9325273353
Now add the decimal point back into the answer:
38.4373 has 4 digits to the right of the decimal point and 24.261 has 3 digits to the right of the decimal point .
For the answer, put the decimal point 7 (4 + 3) places to the right of the answer.
So, the final answer is 932.5273353.
#Correct AnswerYour Answer
2
8.1956
  × 38.2712
Solution
Ignore the decimals for now and multiply as usual.
         81956
      × 382712
        163912
        81956
      573692
     163912
    655648
   245868
   31365544672
Now add the decimal point back into the answer:
8.1956 has 4 digits to the right of the decimal point and 38.2712 has 4 digits to the right of the decimal point .
For the answer, put the decimal point 8 (4 + 4) places to the right of the answer.
So, the final answer is 313.65544672.
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