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B. Solve the following using the problem-solving strategies understand, plan, solve and check. 1. Romel bought 7 kg of butter. He used 2 kg of it for baking cakes and 2, kg for baking cookies. How much butter were left? a. Understand 1. Question asked 2. Information given b. Plan 1. Fundamental operation needed 2. Strategy to use Block model c. Solution​