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2단과 5단만 계산할 줄 알면 되는 곱셈 구구
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무작위 아날로그 시계(시/분/초)
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가분수와 대분수
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진분수의 곱셈
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어항 물채우기(5학년 1학기 수학 66쪽 1번)
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원주율과 원의 넓이
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케익 나누기 (6학년 1학기 수학 교과서 10~11쪽)
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분수만큼은 얼마일까요?(2) (초등 수학익힘책 3학년 2학기 82쪽)
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분수만큼은 얼마일까요(1) (3학년 2학기 수학 80~81쪽)
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원의 구성 요소(초등 3학년 2학기 수학 익힘 48-49쪽)
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3학년 2학기 수학 3단원 단원 문제(72~73쪽)
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원뿔
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