999×778+333×66620.09×37-200.9×1.9+2009×0.82

来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/16 09:46:19
999×778+333×66620.09×37-200.9×1.9+2009×0.82999×778+333×66620.09×37-200.9×1.9+2009×0.82999×778+333×66

999×778+333×66620.09×37-200.9×1.9+2009×0.82
999×778+333×666
20.09×37-200.9×1.9+2009×0.82

999×778+333×66620.09×37-200.9×1.9+2009×0.82
999×778+333×666 = 999×778+333× 3 ×222 = 999×778+999 ×222
= 999×(778+222 ) =999 × 1000 = 999000
20.09×37-200.9×1.9+2009×0.82 = 20.09×37-20.09×10×1.9+20.09×100×0.82
= 20.09 × (37 -19 + 82) = 20.09 × 100 = 2009

999*(778+222)=999000
20.9*(37-10*1.9+100*0.82)=2090

999000
2009