Ages 7–8🧮 MathematicsBeing planted

Adding and subtracting (age 7+)

Add and subtract numbers with up to three digits using formal written methods of columnar addition and subtraction

A first look

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Question 1 of 3

Using columnar subtraction with borrowing, what is 504 minus 279?

Question 2 of 3

Liam has 426 marbles and receives 274 more. If he writes the two numbers one under the other and adds them, how many marbles will he have?

Question 3 of 3

What is the sum of 487 and 259 when you add them using the standard column method?

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Skill names and descriptions include the Marble Skill Taxonomy © Generative Spark, Inc. (withmarble.com), licensed under ODbL 1.0 (database) and CC BY-SA 4.0 (content). Practice questions are GlowGrades's own, each checked by independent verifiers that must agree before a child ever sees it.