How to calculate 225-466+3 18 in grade three?

First calculate 255 plus 3 18, and then subtract 466 from the number. Additive commutative law can be used to calculate 225-466+3 18 for the addition and subtraction operations in the third grade mathematics. First add 255 to 3 18, 255 plus 3 18 equals 573, and then subtract 466 from the obtained number, that is, 573 MINUS 466 equals 107, which can be calculated in the third grade.

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