Ages 6–7🧮 Mathematics9 verified questions on this shelf

Adding and subtracting tens mentally

Add and subtract a two-digit number and tens mentally and using concrete/pictorial representations

Try three questions

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Question 1 of 3

A baker baked 70 cupcakes. He then added 40 more cupcakes to the tray. After that, he gave 30 cupcakes to a customer. How many cupcakes are left on the tray?

Question 2 of 3

What is the sum of 45 and 30?

Question 3 of 3

What is 82 − 40?

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A free account keeps practising Adding and subtracting tens mentally with 9 verified questions, tracks the Skill as it blooms, and connects a real teacher when you want one. Every student account needs a parent's email first.

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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.