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56×1点二五用脱式简便计算

=7×(8×1.25) =7×10 =70 希望能帮到你,请采纳正确答案,点击【采纳答案】,谢谢 ^_^ 你的点赞或采纳是我继续帮助其他人的动力!

5.2×10.1 =5.2×10+5.2×0.1 =52+0.52 =52.52

用脱式计算计算 一点6×7点5×1点二五 =12×1.25 =15

8.8×1.25 =1.1×(8×1.25) =1.1×10 =11 或者: 8.8×1.25 =(8+0.8)×1.25 =8×1.25+0.8×1.25 =10+1 =11

原式 =1.6x7.5x1.25 =0.2x8x7.5x1.25 =(0.2x7.5)x(8x1.25) =1.5x10 =15

11.4+1.25×2.4 =11.4+1.25×8×0.3 =11.4+10×0.3 =11.4+3 =14.4

括号里的20-1点二五×0点八括起来除以一点九脱式计算 解: (20-1.25×0.8)÷1.9 =(20-1)÷1.9 =19÷1.9 =10

5×289×2 =5×2×289 =10×289 =2890

原式 =320x25x125 =(40x8)x25x125 =(40x25)x(8x125) =1000x1000 =1000000 或者 =(4x80)x25x125 =(4x25)x(80x125) =100x10000 =1000000

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