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5 January, 14:44

A school has 20 classrooms. one fourth of the classrooms are for kindergarten and first grade twice as many are for second and third grade the rest are fourth and fifth grade. how many fourth and fifth grade classes are there?

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  1. 5 January, 16:29
    0
    Step-by-step explanation:

    One forth of 20 is 5, so there are 5 kindergarten and first grade classrooms.

    5 x 2 is 10 so there are 10 second and third grade classrooms.

    10 + 5 is 15.

    20 - 15 is 5.

    There are 5 forth and fifth grade classes.
  2. 5 January, 16:54
    0
    A quarter

    Step-by-step explanation:

    1/4 + 2/4=3/4 so fourth and fifth graders have a quarter of the classes
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