用简便方法计算31x75十62x75十93x25
用简便方法计算31x75十62x75十93x25
用简便方法计算
31x75十62x75十93x25
=75×(31+62)+93×25
=75×93+93×25
=93×(75+25)
=93×100
=9300
用简便方法计算667x25十111x75
667x25十111x75
=667x25+111x3x25
=667x25+333x25
=(667+333)x25
=1000x25
=25000
用简便方法计算25x75十25x75
25x75十25x75
=75×(25+25)
=75×50
=3750
用简便方法计算71x25+71x75
71×25+71×75
=71×(25+75)
=71×100
=7100
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14.1X25+7.3x75简便计算
=14.1×25+7.3×3×25
=(14.1+21.9)×25
=36×25
=9×(4×25)
=900
23x75十69x25怎样用简便方法计算
23×75+69×25
=23×3×25+69×25
=69×25+69×25
=69×50
=69×100÷2
=3450
用简便方法计算:62x71十62x28十62
解:
62x71十62x28十62
=62×71+62×28+62×1
=62×(71+28+1)
=62×100
=6200
57x75十42x75十75用简便方法计
57x75十42x75十75
=75×(57+42+1)
=75×100
=7500
423x75十423x25简便方法
=423*(75+25)
=423*100
=42300
25x78-25x25十53x75怎样简便计算
25x78-25x25十53x75
=25x(78 - 25 + 53)
=25x106
=2650