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The language of multiplicative thinking is in RELATIVE terms and taps into the operations of multiplication and division. (“three times as long as”, “one-half the length of.”)
In multiplicative thinking there is a reference/ relationship piece to the language. You are using one thing to describe another.
The language of additive thinking is in ABSOLUTE terms and taps into addition and subtraction.
In additive thinking you are using an absolute quantity to describe the attribute.