12.5x54.7+52÷4/5+5/4 求简便运算
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12.5x54.7+52÷4/5+5/4 求简便运算
12.5x54.7+52÷4/5+5/4 求简便运算
12.5x54.7+52÷4/5+5/4 求简便运算
原式
=1.25×547+52×1.25+1.25
=1.25×(547+52+1)
=1.25×600
=750
=1.25*547+1.25*52+1.25=1.25*(547+52+1)=1.25*600=750
12.5x54.7+52÷4/5+5/4=12.5x54.7+52x5/4+5/4 (除以一个数等于乘以它的倒数)
=12.5x54.7+52x1.25+1.25 (5/4=1.25)
=1.25x547+52x1.25+1...
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12.5x54.7+52÷4/5+5/4=12.5x54.7+52x5/4+5/4 (除以一个数等于乘以它的倒数)
=12.5x54.7+52x1.25+1.25 (5/4=1.25)
=1.25x547+52x1.25+1.25
=1.25x(547+52+1) (乘法分配率)
=1.25x600
=750
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