49.98÷3.4-3.98用简便方法计算

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49.98÷3.4-3.98用简便方法计算49.98÷3.4-3.98用简便方法计算49.98÷3.4-3.98用简便方法计算49.98÷3.4-3.98=14.7-3.98=14.7-4+0.02=

49.98÷3.4-3.98用简便方法计算
49.98÷3.4-3.98用简便方法计算

49.98÷3.4-3.98用简便方法计算
49.98÷3.4-3.98
=14.7-3.98
=14.7-4+0.02
=10.7+0.02
=10.72