75×4.67+52.3×7.5+7.

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75×4.67+52.3×7.5+7.75×4.67+52.3×7.5+7.75×4.67+52.3×7.5+7.75×4.67+52.3×7.5+7.5=7.5×46.7+52.3×7.5+7.5=

75×4.67+52.3×7.5+7.
75×4.67+52.3×7.5+7.

75×4.67+52.3×7.5+7.
75×4.67+52.3×7.5+7.5
=7.5×46.7+52.3×7.5+7.5
=7.5×(46.7+52.3+1)
=7.5×100
=750
【 运用小数的移位以及加法的结合运算 】

75×4.67+52.3×7.5+7.5
=7.5×46.7+52.3×7.5+7.5
=7.5×(46.7+52.3+1)
=7.5×100
=750

75×4.67+52.3×7.5+7.5
=350.25+392.25+7.5
=3292.125
有理数的混合运算一般是先乘方,再乘除,最后加减。
也就是说要先做乘方的运算,再乘除法的运算,最后做加减法的运算。(乘方你学了吗?)

75×4.67+52.3×7.5+7.5=7.5x10x4.67+52.3x7.5+7.5x1=7.5x(10x4.67+52.3+1)=7.5x(46.7+52.3+1)=7.5x(100)=750 问题考的是你会不会将数字重组,运用移动小数点来将算式简化并重新组合来避免要将各项都乘出来。