10 skills · answer key on every sheet
4th Grade Math Worksheets
Every sheet below prints on plain letter paper and comes with its answer key on the second page. The problems are checked against the standard on the label — a sheet labeled for regrouping only contains problems that actually require regrouping.
1. 2-Digit × 1-Digit Multiplication
Multiplying a two-digit number by a one-digit number — 47 × 6.
When: Early fourth grade.
Watch for: Multiplying the ones, then adding the carry before multiplying the tens instead of after.
10 sets · 20 problems each
Next: Two-digit by two-digit.
2. 2-Digit × 2-Digit Multiplication
Multiplying two two-digit numbers — 34 × 27.
When: Middle of fourth grade.
Watch for: Forgetting the placeholder zero on the second row, which shifts the whole partial product one column left.
10 sets · 20 problems each
Next: Long division and fractions.
3. Adding and Subtracting Fractions
Adding or subtracting fractions that already have the same bottom number: the bottom stays and only the tops change.
When: Fourth grade.
Watch for: Adding the bottom numbers too, so that 3/8 + 2/8 becomes 5/16. The pieces are eighths and they stay eighths.
10 sets · 20 problems each
Next: Adding fractions with different bottom numbers in fifth grade.
4. Decimals: Tenths and Hundredths
Writing fractions with 10 or 100 on the bottom as decimals, and writing decimals as fractions.
When: Fourth grade, after fractions.
Watch for: Writing 7/100 as 0.7 instead of 0.07 — leaving out the zero that holds the tenths place.
10 sets · 20 problems each
Next: Decimal operations in fifth grade.
5. Equivalent Fractions
Fractions that name the same amount, like 2/3 and 8/12: multiply the top and the bottom by the same number.
When: Fourth grade, after fractions as parts of a whole in third grade.
Watch for: Multiplying only the bottom number, which changes the amount. Whatever you do to the denominator, do to the numerator too.
10 sets · 20 problems each
Next: Adding and subtracting fractions.
6. Factors and Multiples
Factors are numbers you can multiply to make another number. A number is a factor if it divides the other number with nothing left over.
When: Fourth grade, using the multiplication facts.
Watch for: Forgetting 1 and the number itself, or listing only the first pairs found.
10 sets · 20 problems each
Next: Equivalent fractions, which use the same multiplication facts.
7. Finding Unknown Angles
Finding a missing angle when a big angle is split into parts: the parts add up to the whole angle.
When: Fourth grade, alongside measuring with a protractor.
Watch for: Adding the two known numbers instead of subtracting one part from the whole angle.
10 sets · 12 problems each
Next: Drawing and measuring angles with a protractor.
8. Multi-Step Word Problems
Stories that need two operations, such as multiplying to find a total and then taking some away.
When: Fourth grade.
Watch for: Doing the operations in the order the numbers appear instead of the order the story needs.
10 sets · 12 problems each
Next: Multi-step problems with fractions in fifth grade.
9. Place Value to Millions
Reading and understanding numbers up to the millions: each digit is worth ten times the digit to its right.
When: Fourth grade.
Watch for: Giving the digit's name instead of its value. The 6 in 3,462,810 is in the ten thousands place, so it is worth 60,000, not 6.
10 sets · 12 problems each
Next: Rounding large numbers.
10. Rounding Large Numbers
Rounding numbers up to a million to the nearest thousand, ten thousand or hundred thousand.
When: Fourth grade.
Watch for: Keeping the digits after the rounding place instead of replacing them with zeros.
10 sets · 20 problems each
Next: Estimating sums and differences.
Common Core State Standards © 2010 National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.