27×6.25+53×3.75的简便运算?

求27×6.25+53×3.75的简便运算方法。
2024年11月28日 04:34
有3个网友回答
网友(1):

原式=27x6.25+(54-1)x3.75
=27(6.25+7.5)-3.75
=27x13.75-3.75
=27(10+3.75)-3.75
=270+3.75(27-1)
=270+10x3.75x2+6x3.75
=270+37.5+37.5+22.5
=270+75+22.5
=270+100-2.5
=367.5

网友(2):

27×6.25+53×3.75
=27×6.25+53×(10-6.25)
=27×6.25+530-53×6.25
=(27-53)×6.25+530
=-26×6.25+530
=-162.5+530
=367.5

网友(3):

6.25=5×1.25 3.75=3×1.25
27×6.25+53×3.75
=27×5×1.25+53×3×1.25
=135×1.25+159×1.25
(提取公因式1.25)=(135+159)×1.25=294×1.25=367.5