Ages 7–8🧮 Mathematics10 verified questions on this shelf

Missing number problems (age 7+)

Solve addition and subtraction problems including missing-number problems, using number facts, place value, and more complex methods

Try three questions

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Question 1 of 3

What number should replace the question mark? 245 + ? = 380

Question 2 of 3

What number should replace the question mark in the equation 245 + ? = 380?

Question 3 of 3

Liam had 642 marbles. He gave 185 marbles to a friend. Afterwards he wants to have exactly 800 marbles, so he buys more marbles. How many marbles must he buy?

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A free account keeps practising Missing number problems (age 7+) with 10 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.