Addition to 100 · Easy
10 problems · Plain
Addition worksheets for Grade 3
Third graders are expected to add quickly and accurately within 100. These sheets give steady practice with regrouping, three addends and missing addends. Add your kid's name and print a fresh set whenever you like.
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Ready-made sheets 9 ready-made sheets
Addition to 100 · Medium
10 problems · Dinosaurs
Addition to 100 · Hard
10 problems · Space
Adding three numbers · Easy
10 problems · Ocean
Adding three numbers · Medium
10 problems · Unicorns
Adding three numbers · Hard
10 problems · Cars
Missing addends · Easy
12 problems · Jungle
Missing addends · Medium
12 problems · Plain
Missing addends · Hard
12 problems · Dinosaurs
Parent guide
By Grade 3, addition should feel automatic, and the goal shifts from learning the steps to doing them smoothly. Kids who still count on fingers for 8 + 7 will slow down on every bigger problem, so a little regular practice pays off here.
Start with sums to 100 at the medium level to see where things stand. If regrouping trips your kid up, hard sheets give plenty of stacked practice, and you can drop back to medium for a breather. Watch for the usual slip: adding the ones correctly but forgetting the extra ten.
Three addends build mental flexibility. Encourage your kid to look for pairs that make ten or a round number before adding anything. For 17 + 6 + 3, adding 17 and 3 first is far easier. That habit is worth more than any trick.
Missing addend sheets, such as 47 + __ = 90, ask kids to think in both directions. Talk it through: count up to the next ten, then to the target. This sets up the link to subtraction facts later in the year.
Short and regular wins. Eight problems a few times a week keeps skills fresh without the groaning.