用简便方法计算 46.5×99+46.5 7.96+0.49-2.96.

2025-05-20 12:05:06
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回答(1):

①46.5×99+46.5 =46.5×(99+1) =46.5×100 =4650; ②7.96+0.49-2.96. =7.96-2.96+0.49 =5+0.49 =5.49.