9999×7778+3333×6666怎么简算啊
展开全部
9999×7778+3333×6666
=9999×7778+3333×3×2222
=9999×7778+9999×2222
=9999×(7778+2222)
=9999×10000
=99990000
=9999×7778+3333×3×2222
=9999×7778+9999×2222
=9999×(7778+2222)
=9999×10000
=99990000
追问
5.6×69.32+138.64×0.05+693.2×0.43又怎样简算啊
追答
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+4.3)×69.32
=10×69.32
=693.2
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展开全部
9999×7778+3333×6666
=9999×7778+9999×2222
=9999×(7778+2222)
=9999×10000
=99990000
=9999×7778+9999×2222
=9999×(7778+2222)
=9999×10000
=99990000
追问
5.6×69.32+138.64×0.05+693.2×0.43又怎样简算啊
追答
????
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