MathematicsBeginner

Sum-and-multiple and difference-and-multiple

Sum over n+1, difference over n−1

Estimated time · 9 min 10 Content blocks

Core concepts

Formulas

小数=和n+1,小数=差n−1\text{小数}=\frac{\text{和}}{n+1},\qquad \text{小数}=\frac{\text{差}}{n-1}

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Exercises

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Prerequisites

Finding the whole from a part9 min
Practice set
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