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arithmetic

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My question is about estimaing products
Examples: 1/5 x 26; 1/3 x 4/11; and 4 1/3 x 3 7/8. i can't remember how to multiply these types of problems let alone,estimate the products. Can u please help me to help my son.

  • arithmetic - ,

    1/5 x 26.
    That's about 25/5 = about 5.

    1/3 x 4/11.
    That's 1 x 4 = 4 for the numerator.
    3 x 11 = 33 for the denominator.
    4/33 = about 4/32 = about 1/8

    4 1/3 x 3 7/8.
    That's about 4 x 4 = about 16.

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