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Quizzes > High School Quizzes > Mathematics

Decimals Operations Practice Quiz

Practice addition, subtraction, multiplication, and division problems

Difficulty: Moderate
Grade: Grade 5
Study OutcomesCheat Sheet
Paper art promoting Decimal Operations Mastery quiz for middle school math students.

What is 3.5 + 2.75?
7.25
6.25
6.15
5.25
Adding 3.5 and 2.75 by aligning the decimal points gives 6.25. This demonstrates basic decimal addition skills.
What is 5.0 - 3.2?
2.8
1.2
2.0
1.8
Subtracting 3.2 from 5.0 results in 1.8. Proper alignment of the decimal points is crucial in subtraction.
Multiply 0.5 by 0.2.
0.7
0.1
0.07
1.0
Multiplying 0.5 by 0.2 involves simple decimal multiplication resulting in 0.1. This demonstrates basic multiplication of decimals.
Divide 4.8 by 2.
3.0
2.0
2.4
2.8
Dividing 4.8 by 2 yields 2.4. This question reinforces the concept of dividing decimals by whole numbers.
What is the value of 0.75 rounded to the nearest tenth?
0.75
0.7
0.8
1.0
Rounding 0.75 to the nearest tenth gives 0.8, as the hundredths digit 5 rounds up. This question tests rounding rules with decimals.
Calculate 12.45 + 7.8.
19.25
20.25
20.15
21.25
Align the decimals and add the numbers correctly to obtain 20.25. This reinforces correct addition of decimals.
Subtract 3.56 from 10.0.
6.44
7.14
7.44
6.14
Subtracting 3.56 from 10.0 gives 6.44 after aligning the decimal points. This question strengthens subtraction skills with decimals.
Multiply 6.2 by 0.3.
1.86
1.87
2.1
1.96
Multiplying 6.2 by 0.3 yields 1.86 by treating the numbers as whole numbers and then adjusting the decimal place. This is a basic multiplication problem involving decimals.
Divide 9.6 by 0.4.
4
4.8
2.4
24
Dividing 9.6 by 0.4 can be simplified by eliminating the decimal, resulting in 24. This problem tests division with decimals.
What is the product of 3.25 and 4.0?
14
12
13
13.25
Multiplying 3.25 by 4.0 results in 13. This reinforces multiplication techniques with decimals.
Divide 0.81 by 9.
9
0.1
0.09
0.11
Dividing 0.81 by 9 gives 0.09 when computed correctly. This question focuses on division involving decimals and whole numbers.
If you add 0.125 to 0.875, what is the sum?
1.5
0.95
1.0
1.125
Adding 0.125 and 0.875 results in exactly 1.0. This problem demonstrates the precision of decimal addition.
Solve: 15.6 - 7.35.
8.15
8.25
8.35
7.25
Subtracting 7.35 from 15.6, after proper alignment, yields 8.25. This tests accurate subtraction of decimals.
Calculate the product of 0.12 and 25.
2.5
3.2
3
2.8
Multiplying 0.12 by 25 results in 3 by converting and adjusting the decimal. This question reinforces multiplication of decimals with whole numbers.
What is the result of dividing 7.2 by 1.2?
6
7
8
6.5
Dividing 7.2 by 1.2 yields 6 by simplifying the division process. This problem focuses on precise decimal division.
A recipe requires 2.75 cups of flour. If a chef scales the recipe by 2.5 times, how many cups of flour are needed?
6.75
7.125
6.875
7.0
Scaling the recipe involves multiplying the original quantity by the scale factor. Multiplying 2.75 by 2.5 correctly results in 6.875.
Subtract 4.375 from 9.2 and then round the result to the nearest hundredth.
4.85
4.82
4.83
4.80
Subtracting 4.375 from 9.2 gives 4.825, and rounding to the nearest hundredth yields 4.83. This question tests both subtraction and rounding skills with decimals.
Multiply 0.45 by 0.12 and express your answer as a decimal.
0.048
0.064
0.094
0.054
Multiplying these decimals involves treating them as whole numbers first and then placing the decimal point in the correct position. The correct product is 0.054.
Divide 5.625 by 0.75. What is the quotient?
7.0
8.5
6.5
7.5
Dividing 5.625 by 0.75 simplifies to 7.5 by converting the divisor to a whole number. This reinforces division of decimals.
A store sold 12.5 liters of juice, and each bottle holds 0.625 liters. How many bottles were sold?
15
22
18
20
Dividing the total amount of juice by the capacity of one bottle gives the number of bottles sold. The correct computation results in 20 bottles.
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Study Outcomes

  1. Apply standard algorithms to add decimals accurately.
  2. Analyze subtraction techniques to correctly align decimal points.
  3. Multiply decimals by using place value strategies and conversion methods.
  4. Divide decimals by transforming division problems into whole number computations.

Decimals Quiz: Add, Subtract, Multiply & Divide Cheat Sheet

  1. Understanding Decimal Place Values - Imagine each digit as its own little explorer: moving one spot to the right makes its value ten times smaller! Mastering tenths, hundredths, and thousandths ensures you're always precise when you add, subtract, or compare decimals. OpenStax: Decimal Operations
  2. Adding Decimals - Line up those decimal points like you're stacking blocks, then add as if they were whole numbers - don't forget to pad with zeros if one number has fewer digits! This trick keeps everything neat and error‑free, giving you sums that make sense. OpenStax: Decimal Operations
  3. Subtracting Decimals - Just like addition, keep those decimal points in a straight line, then subtract as usual. Borrowing can be a snap once you visualize each place value doing its job - so your differences stay spot on! OpenStax: Decimal Operations
  4. Multiplying Decimals - Multiply as though decimals don't exist, then count how many decimal places you had in both numbers combined. Finally, place your decimal point in the product so that it has that exact count - voilà, multiplication magic! OpenStax: Decimal Operations
  5. Dividing Decimals - Make the divisor a whole number by sliding its decimal to the right, then do the same shift to the dividend. Divide as normal, and you'll breeze through problems that once seemed tricky! OpenStax: Decimal Operations
  6. Converting Fractions to Decimals - Turn fractions into decimals by dividing the top number by the bottom number - think of it as a mini calculator in your brain! Handy for instant conversions like 1/4 becoming 0.25. OpenStax: Decimal Operations
  7. Rounding Decimals - To round, peek at the digit right after the target place: if it's 5 or above, round up; if not, keep it down. This simple rule helps you tidy numbers for quick estimates or neat answers. OpenStax: Decimal Operations
  8. Estimating Decimal Sums and Differences - For lightning‑fast checks, round each decimal to the nearest whole and then add or subtract. It's like a math shortcut that gives you a great ballpark answer in seconds! OpenStax: Decimal Operations
  9. Applying Decimals in Real-Life Scenarios - Whether you're splitting a pizza, measuring ingredients, or budgeting your allowance, decimals are everywhere. Practice in everyday contexts to see the real power of decimal operations! OpenStax: Decimal Operations
  10. Practicing with Decimal Worksheets - The more you practice, the more confident you become! Tackle a variety of problems - from basics to brain‑teasers - using curated worksheets that keep you on your toes. Math Is Fun: Decimal Worksheets
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