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5 January, 23:48

Show two ways to decompose the number 749?

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  1. 5 January, 23:59
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    Two ways to decompose this number is:

    749 = 700+40+9; and

    749 = 100+649.

    Explanation:

    One method to decompose a number is to break it up by place value, into hundreds, tens and ones.

    In this number, 7 is in the hundreds place; this makes 7 (100) = 700.

    4 is in the tens place; 4 (10) = 40.

    9 is in the ones place; 9 (1) = 9.

    This makes 749 = 700+40+9.

    Another method to decompose a number is to break it into pieces that can be added together.

    For this number, I chose to start with 100. This means the second addend would be 749-100 = 649; this gives us

    749 = 100+649.
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