用简便方法计算42ox78十22ox42
用简便方法计算42ox78十22ox42
=420x(78+22)
=420x100
=42000
=420x(78+22)
=420x100
=42000
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第1个回答 2016-05-12
用简便方法计算420x78十220x42
420x78十220x42
=420x78+420x22
=420x(78+22)
=420x100
=42000
420x78十220x42
=420x78+420x22
=420x(78+22)
=420x100
=42000
