5th grade math

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the press was invented about 1450 and had little change for 350 years. since then many changes have been made. how many decades have changes been occurring?

  • 5th grade math -

    1450 + 350 = 1800

    2012 - 1800 = 212

    212 / 10 = 21 decades

  • 5th grade math -

    50 out of350studentwho sat a test scored less than 50 marks what percent scored less than 50 marks

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