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简算.(需要过程) 9999x7778+3333x6666 5.6x69.32+...

9999x7778+3333x6666 =3333x3x7778+3333x6666 =3333x23334+3333x6666 =3333x(23334+6666) =3333x30000 =99990000 5.6x69.32+138.64x0.05+693.2x0.43 =5.6x69.32+69.32x2x0.05+69.32x4.3 =69.32x(5.6+0.1+4.3) =69.32x10 =693.2

9999x7778+3333x6666=9999*(7778+2222)=9999*10000=99990000

5.6x69.32+138.64x0.05+693.2x0.43 =5.6x69.32+69.32x2x0.05+69.32x4.3 =(5.6+2x0.05+4.3)x69.32 =10x69.32 =693.2

5.6x69.32+138.64x0.05+693.2x0.43 =69.32x(5.6+2x0.05+10x0.43) =69.32x(5.6+0.1+4.3) =69.32x10 =693.2

9999×7778+3333×6666 原式=9999×7778+3333×3×2222 =9999×7778+9999×2222 =9999×(7778+2222) =9999×10000 =99990000 5.6×69.32+138.64×0.05+693.2×0.43 =5.6×69.32+69.32×2×0.05+69.32×4.3 =5.6×69.32+69.32×0.1+69.32×4.3 =(5.6+0.1+4...

5.6X69.32+138.64X0.05+693.2X0.43 =5.6×69.32+69.32×4.3+138.64×0.05 =(5.6+4.3)×69.32+69.32×2×0.05 =10×69.32+69.32+0.1 =693.2+6.932 =693.2+6.8+0.132 =700+0.132 =700.132

5.6*69.32+138.64*0.05+693.2*0.43 =5.6*69.32+69.32*2*0.05+69.32*10*0.43 =69.32*(5.6+2*0.05+10*0.43) =69.32*(5.6+0.1+4.3) =69.32*10 =693.2

5.6×69.32+138.64×0.05+693.2×0.43 =5.6x69.32+69.32x0.1+69.32x4.3 =69.32x(5.6+0.1+4.3) =69.32x10 =693.2 请采纳正确答案,你们只提问,不采纳正确答案,回答都没有劲!谢谢管理员推荐采纳!! 朋友,请【采纳答案】,您的采纳是我答题的动...

(1)9999×7778+3333×6666 =9999×7778+9999×2222 =9999×(7778+2222) =9999×10000 =99990000 (2)5.6×69.32+69.32×0.1+69.32×4.3 =(5.6+0.1+4.3)×69.32 =10×69.32 =693.2

5.6乘69.32+138.64乘0.05+693.2乘0.43 =5.6×69.32+69.32×2×0.05+69.32×10×0.43 =5.6×69.32+69.32×0.1+69.32×4.3 =(5.6+0.1+4.3)×69.32 =10×69.32 =693.2

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