来自戴殿珠的问题
【简算.(1)9999×7778+3333×6666(2)5.6×69.32+138.64×0.05+693.2×0.43.】
简算.
(1)9999×7778+3333×6666
(2)5.6×69.32+138.64×0.05+693.2×0.43.
1回答
2020-06-24 13:22
【简算.(1)9999×7778+3333×6666(2)5.6×69.32+138.64×0.05+693.2×0.43.】
简算.
(1)9999×7778+3333×6666
(2)5.6×69.32+138.64×0.05+693.2×0.43.
(1)9999×7778+3333×6666,=9999×7778+3333×3×2222,=9999×7778+9999×2222,=9999×(7778+2222),=9999×10000,=99990000;(2)5.6×69.32+138.64×0.05+693.2×0.43,=5.6×69.32+6.932+693.2×0.43,=...