Use it first___________ The rule transforms subtraction in the mixed operation of rational numbers into_____ And then in use_____ ,_____ The calculation is simple | Math enthusiast | Mathematical art

Use it first_________ The rule transforms subtraction in the mixed operation of rational numbers into_ And then in use_ ,___ The calculation is simple

First, we use the law of negative numbers (or opposite numbers) to convert subtraction into addition in the mixed operation of rational numbers, and then use the combination law, distribution law and simple calculation

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