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Mystery BureauGrade 3 › Multiples

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Cut Only the Multiples: Free Grade 3 Multiples and Times-Table Practice

Security lasers web the bridge hatch, each beam labeled with a number, and only the multiples of the code number can be cut safely. Cut a 42 when the code is 6 and you're through; cut a 41 and you aren't. Recognizing multiples on sight is a different skill from reciting a times table in order, and it's the one that carries into division, factors and fractions later. The code number changes every run, so no single table gets over-practiced.

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What this station asks for

Five questions it might ask

Drawn from the same pool the activity uses, so these are the real thing rather than an illustration. The numbers change on every attempt — there is no fixed set to memorize.

QuestionAnswer
Cut every beam that is a multiple of 642, 30, 24 (3 of 6 beams)
Cut every beam that is a multiple of 749, 63, 21 (3 of 6 beams)
Cut every beam that is a multiple of 832, 48, 40 (3 of 6 beams)
Cut every beam that is a multiple of 318, 24, 12 (3 of 6 beams)
Cut every beam that is a multiple of 535, 10, 40 (3 of 6 beams)

👀 What to watch for

Third graders often know the 6 times table perfectly and still can't answer "is 42 a multiple of 6?" without starting at 6 and counting up. That's the exact gap this station targets — the table read backwards.

The Common Core standard behind it

Official wording, quoted in full — not our summary of it:

3.OA.C.7Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division or properties of operations. By the end of Grade 3, know from memory all products of two one-digit numbers.

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Other Grade 3 skills in this case

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