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876 divided by 21. You can use your knowledge of the base 10 system to say: 21X10=210(too small)

21X20=420(still too small)

21X30=630(let me subtract 876-630=246, I'm getting close)

21X40=840 and when I subtract I get a remainder of 36. I can make 1 more group of 21. 36-21=15. So my answer is 41 with a remainder of 15.

You can use multiples of 100,100, etc. for larger numbers.

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Q: What is the multiples of 10-strategy for division?
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