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Add or subtract with in 20

Add or subtract with in 20

Add or subtract with in 20

Add or subtract with in 20

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Addition/Subtraction

To find missing numbers, compare sequences or ranges to identify gaps. Use logical reasoning, patterns, or mathematical operations to determine what’s missing. For numerical series, check arithmetic or geometric rules. In puzzles, observe patterns like increasing differences or positions. Systematic analysis ensures accuracy in identifying the missing numbers efficiently.