20 questions
3rd - 3rd Grade
Mathematics
Grade 3 Unit 5 Addition and Subtraction is a free printable mathematics worksheet with 20 multiple-choice questions and a complete answer key. It helps students distinguish addition and subtraction vocabulary, including sum and difference, then apply those concepts to compute two- and three-digit problems. Students also use expanded form to add, solve addition and subtraction word problems, and round two-digit numbers to the nearest ten. This worksheet gives Grade 3 learners varied practice choosing correct operations and answers in both numerical and real-world contexts. Questions about students, stickers, cupcakes, marbles, baseball cards, and arcade tickets require students to interpret whether a situation involves combining, comparing, or finding an amount left. The answer choices make it useful for checking place-value reasoning, computation accuracy, operation selection, and rounding understanding. Use it for independent practice, review, homework, or a quick assessment of addition and subtraction readiness.
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WorksheetsAnswer Keysum
50 + 20 and 6 + 9 ......56 + 29 = 85
669
982 students
658 stickers
difference
21
518
12 cupcakes
334 marbles
132 baseball cards
193 tickets
20
30
60
700
400
200
500 jewels
700 plays
This worksheet uses 20 multiple-choice questions to practise addition and subtraction vocabulary, two- and three-digit computation, expanded-form addition, addition and subtraction word problems, and rounding two-digit numbers to the nearest ten. Students build fluency by selecting sums and differences, interpreting real-world situations, and applying place-value and rounding strategies.
Introduce sum and difference before students begin, then model the expanded-form item by separating tens and ones and combining the partial values. Have students explain whether each story problem represents joining, comparing, or finding an amount left, and finish by discussing which digit determines rounding to the nearest ten. Use the multiple-choice options to ask students why an incorrect answer does not fit the calculation or situation.
Watch for students confusing sum with difference or choosing addition when a word problem asks how many remain or how many more one amount is than another. In the expanded-form question, students may combine the wrong place values, while computation items can reveal errors when regrouping across tens or hundreds. For rounding, check that students look at the ones digit rather than rounding based on the tens digit alone.
Wayground provides this worksheet as both a printable PDF and a digital quiz, and it includes a complete answer key for checking all 20 multiple-choice questions. You can assign the digital version through Wayground or print it for paper practice; printable submissions can be graded by scanning student work with the Wayground for Teachers app.
Use the worksheet’s Advanced Settings to adjust font spacing and font size so the multiple-choice equations, word problems, and answer options are easier to read. You can also apply a dyslexia-friendly font or translate the worksheet into another language when that better supports access to the addition, subtraction, and rounding tasks.
Wayground offers a comprehensive collection of free printable worksheets and practice problems across all subjects, with downloadable PDFs and answer keys to help students master essential skills and concepts. Browse more resources at https://wayground.com/en-us/worksheets.