Ages 6–7🧮 Mathematics11 verified questions on this shelf

Inverse: addition undoes subtraction

Recognise and use the inverse relationship between addition and subtraction to check calculations and solve missing-number problems

Try three questions

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Question 1 of 3

What number belongs in the box? □ + 6 = 13

Question 2 of 3

Lily had some beads. She took away 5 beads, then added 9 beads, and now has 21 beads. How many beads did she start with?

Question 3 of 3

What number should replace the box in the equation □ + 8 = 13?

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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.