គណិតវិទ្យាថ្នាក់ទី6 ៖ មេរៀនទី15 /វិធីដកចំនួនចម្រុះ /កំណែលំហាត់ទី2 /ទំព័រទី102 # 95

Описание: Grade 6 math: How to subtract mixed numbers with like and unlike denominators.
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