Study

第一關

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  • 7 × 5 =35立方分米
  • 20 × 20 =400立方米
  • 9 × 3 = 27立方米
  • 10 × 10 =100立方米
  • 12 × 3 =36立方米
  • 6 × 4 =24立方米
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