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250x9x4简算

=250x4x9 =1000x9 =9000

24x9x4 =24x4x(10-1) =96x(10-1) =960-96 =864

(25*4)X(8*9)=7200

(1.9X9.5)X4 =1.9X(9.5X4) =(2-0.1)X38 =2X38-0.1X38 =76-3.8 =72.2

25×9÷45x4 =5X5X9÷45X4 =5x4X45÷45 =20X(45÷45) =2Ox1 =20

25x(37x4)x9 =25×4×9×37 =100×9×37 =900×37 =33300

原式=999x56+999x44 =999x(56+44) =999x100 =99900

提取公因式1111, 解:8888x9+7777x4 =1111(8x9+7x4) =1111x100 =111100

84*5 =(80+4)*5 =400+20 =420 239*4 =(240-1)*4 =960-4 =956

54×4÷54×9 =(54÷54)×(4×9) =1×36 =36 你好,本题已解答,如果满意,请点右上角“采纳答案”,支持一下。

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