Also, we can combine prime factors to get other factors: 2 x 3 x 3 = 18. 18x7= 126. Prime factorization can also sawe some time. For example, on day #123, we know 3 will work because the digits add up to a number that is a multiple ofanbsp;...

Title | : | Number Sense and the Days of School |

Author | : | Christopher Casey |

Publisher | : | FastPencil Inc - 2009-11-01 |

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