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9.4x9.9简便运算

7.4*9.9 =7.4*(10-0.1) =7.4*10-7.4*0.1 =74-0.74 =73.26

你好!3.6x9.9=4*0.9+11*0.9=0.9*(4+11)=0.9*15=13.5 希望对你有所帮助,望采纳.

9.9x34 =(10-0.1)x34 =34-3.4 =30.6

3.5x9.9简便计算=3.5*(10-0.1)=3.5*10-3.5*0.1=35-0.35=34.65

34x9.9=34*(10-0.1)=34*10-34*0.1=340-3.4=336.6

你好!.4*99=9.4*(100-1)=9.4*100-9.4=930仅代表个人观点,不喜勿喷,谢谢.

4.86*9.9=4.86*(10-0.1)=4.86*10-4.86*0.1=48.6-0.486=48.114

4.3x9.9十43x0.01=4.3x9.9十4.3x0.1=4.3x(9.9十0.1)=4.3x10=43

4.8*(10-0.1)=4.8*10-4.8*0.1=48-0.48=47.52

9.9x9.9=(10-0.1)x9.9=99-0.1x9.9=99-0.99=98.01希望采纳我的答案,谢谢!

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