Ages 7–8🧮 Mathematics9 verified questions on this shelf

Mentally adding tens to 3-digit numbers

Mentally add and subtract a three-digit number and tens

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Question 1 of 3

Sara has 527 stickers. She receives a pack that contains 60 additional stickers. How many stickers does she have in total?

Question 2 of 3

What is 345 + 40?

Question 3 of 3

What is 462 − 30?

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A free account keeps practising Mentally adding tens to 3-digit numbers 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.

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.