13 skills · answer key on every sheet
2nd 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. Adding Three Numbers
Adding three numbers in one problem.
When: Second grade.
Watch for: Adding strictly left to right and missing easy pairs — 7 + 8 + 3 is much easier as (7 + 3) + 8.
10 sets · 20 problems each
Next: Repeated addition, the doorway to multiplication.
2. Addition With Regrouping to 100
Two-digit addition where the ones column crosses ten — 47 + 38.
When: Middle of second grade. CCSS 2.NBT.B.5 expects fluency by year's end.
Watch for: Writing the full two-digit sum in the ones column: 47 + 38 written as 715, because 7 + 8 = 15 goes in whole.
10 sets · 20 problems each
Next: Subtraction within 100.
3. Addition Within 100
Adding two-digit numbers where the ones do not carry — 34 + 25.
When: Early second grade.
Watch for: Misaligning the columns when copying from a horizontal problem, so 34 + 5 becomes 34 + 50.
10 sets · 20 problems each
Next: Addition with regrouping to 100.
4. Arrays and Repeated Addition
Seeing objects in equal rows and writing the total as repeated addition.
When: Second grade, the step before multiplication.
Watch for: Counting every dot one at a time and losing track, instead of finding one row and adding it again for each row.
10 sets · 12 problems each
Next: Multiplication facts in third grade, where 5 + 5 + 5 becomes 3 × 5.
5. Comparing Three-Digit Numbers
Comparing three-digit numbers: hundreds first, then tens, then ones.
When: Second grade.
Watch for: Comparing from the right. Always start at the left, with the biggest place value.
10 sets · 20 problems each
Next: Rounding in third grade.
6. Counting Coins
Adding up coins to find a total in cents: a quarter is 25, a dime 10, a nickel 5 and a penny 1.
When: Second grade.
Watch for: Counting every coin as one cent. Start with the biggest coin and count on from there.
10 sets · 12 problems each
Next: Counting dollars and cents.
7. Even and Odd Numbers
Even numbers can be split into two equal groups, or into pairs, with none left over. Odd numbers always leave one.
When: Second grade.
Watch for: Looking at the first digit. Only the ones digit decides: 0, 2, 4, 6 and 8 mean even.
10 sets · 20 problems each
Next: Skip counting and multiplication.
8. Place Value: Hundreds
Reading three-digit numbers as hundreds, tens, and ones.
When: Early second grade.
Watch for: Writing "three hundred forty-two" as 30042 — each spoken part written literally.
10 sets · 20 problems each
Next: Skip counting and rounding.
9. Repeated Addition
Seeing 4 + 4 + 4 as three groups of four, written 3 × 4.
When: Late second grade.
Watch for: Reversing the meaning: writing 4 × 3 for "three groups of four". Both give 12, so the error stays hidden until word problems arrive.
10 sets · 20 problems each
Next: Multiplication facts in third grade.
10. Skip Counting
Counting by 2s, 5s, 10s, and beyond.
When: Throughout second grade.
Watch for: Skip counting fluently from zero but stalling when asked to start from another number — 15, 20, 25 is harder than 5, 10, 15.
10 sets · 20 problems each
Next: Repeated addition and arrays.
11. Subtraction Within 100
Two-digit subtraction that requires regrouping — 52 − 27.
When: Middle of second grade. This is the skill most second graders struggle with longest.
Watch for: Subtracting the smaller digit from the larger in each column regardless of which is on top: 52 − 27 answered as 35, from 7 − 2 and 5 − 2.
10 sets · 20 problems each
Next: Three-digit addition and subtraction.
12. Telling Time to 5 Minutes
Reading a clock to the nearest 5 minutes by counting by fives around the clock face.
When: Second grade.
Watch for: Reading the number the minute hand points to as the minutes. When it points to 3, that is 15 minutes, not 3.
10 sets · 12 problems each
Next: Elapsed time in third grade.
13. Two-Step Word Problems
Stories that need two steps, such as taking some away and then adding some more.
When: Second grade, after one-step word problems and adding and subtracting within 100.
Watch for: Doing only the first step and stopping. Each sentence in the story is usually a step.
10 sets · 12 problems each
Next: Multiplication and division word problems in third grade.
Common Core State Standards © 2010 National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.