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This Subtraction No Borrowing drill has 40 problems for Grade 2. Dragonflies theme. Answer key included.
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Max discovered 47 dragonflies tangled in vines—he must free them before the storm arrives!
Standard: CCSS.MATH.2.NBT.B.5
Subtraction without borrowing is a critical stepping stone in your second grader's math journey because it builds fluency with numbers and strengthens their understanding of place value. At ages 7-8, children are developing the mental stamina to solve problems independently, and mastering subtraction-no-borrowing gives them confidence before tackling more complex regrouping. This skill shows up constantly in real life—figuring out how many crayons are left after using some, or how much change remains from a small purchase. When students can quickly subtract without borrowing (like 47 - 23), they're not just memorizing facts; they're learning to decompose numbers and think flexibly about digits in the tens and ones places. This foundation directly supports their ability to handle harder subtraction later and builds the number sense they'll rely on for multiplication, division, and fractions.
Second graders often confuse which digit to subtract first, sometimes subtracting the top number from the bottom instead of the reverse—for example, solving 53 - 21 as 32 instead of 32 by computing 1 - 5 = -4 in the ones place and freezing up. Another frequent error is misreading the ones and tens digits, especially in problems where digits are similar (like 44 - 22), leading them to subtract carelessly without regrouping concern. Watch for students who skip the ones or tens column entirely, or who subtract across columns without attending to place value. You can spot this by checking if their answers don't match the magnitude of the problem—for instance, if 67 - 42 somehow becomes 31 instead of 25, they've likely mixed up their digits or direction.
Create a simple subtraction game using objects your child can see and touch—perhaps pebbles, blocks, or dried beans in two piles on a table. Ask your second grader to 'start with 36 items, remove 14, and count what's left,' then write the problem (36 - 14 = 22) on paper afterward to connect the physical action to symbols. This concrete-to-abstract approach helps them understand subtraction as 'taking away' and reinforces place value since they can actually group objects by tens and ones. Repeat this weekly with different numbers—it's quick, memorable, and builds the mental imagery they need to solve problems independently.