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二点八乘23点四加十一点一乘以57点六加六点五四乘...

2又5分之4×23.4+11.1×57.6+6.54×28 =2.8×23.4+65.4×28+11.1×57.6 =2.8×(23.4+65.4)+11.1×57.6 =2.8×88.8+11.1×57.6 =22.4×11.1+11.1×57.6 =11.1×(22.4+57.6) =11.1×80 =888

2又5分之4×23点4+11点1×57点6+6点54×28 =2.8X23.4+11.1X57.6+6.54X28 =2.8X23.4+11.1X57.6+65.4X2.8 =2.8X23.4+65.4X2.8+11.1X57.6 =2.8X(23.4+65.4)+11.1X57.6 =2.8X88.8+11.1X57.6 =2.8X88.8+11.1X8X7.2 =2.8X88.8+88.8X7.2 =(2.8+7.2)X88.8 =...

原式 =57.6x1.6+28.8x36.8-14.4x80 =14.4x4x1.6+14.4x2x36.8-14.4x80 =14.4x6.4+14.4x73.6-14.4x80 =14.4x(6.4+73.6-80) =14.4x(80-80) =14.4x0 =0 或者: =57.6x1.6+28.8x2x18.4-14.4x4x20 =57.6x1.6+57.6x18.4-57.6x20 =57.6x(1.6+18.4-20) =5...

4.5×57.8×45.3×5.6=65982.168≈65982

57.6/8竖式计算答案 57.6÷8=7.2 仅供参考,有用请采纳。

123点5-57点8+14点三的简便运算 123点5-57点8+14点三 =123.5+14.3-57.8 =137.8-57.8 =80

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