• Subtraction of Whole Numbers

    algorithm: a set of routine steps used to solve problems.

    difference: the result of subtraction.

    estimate (noun): a close guess made using mathematical thinking.

    estimate (verb): to give an approximate number or answer based on mathematical thinking.

    reasonable: something that makes sense when given facts are taken into account.

    regroup: to compose or decompose ones, tens, hundreds, thousands, and so forth.

    sum: the result of addition.

    Subtraction Strategies

    Subtraction Strategies