What’s the Sum of 2 5 and 2 4. Estimating Sums and Differences of Fractions Reckoner Figurer Apply Estimate sums and differences for positive proper fractions, n/d (numerator/denominator), where n ≤ d and 0 ≤ n/d ≤ i. Use rounding to estimate answers when adding or subtracting proper fractions. Estimating …

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