質問: 7m+45cm+81mm - math - decimals 7m+45cm+81mm
回答: dear student, we have,7m+45cm+81mmwe know 1cm=10mmso, 45 cm=45×10=450 mmalso, 1m=1000mm7m=7×1000=7000 mmthus the question becomes7m+45cm+81mm=7000mm+450mm+81mm=7531 mm regards