如题所述
第1个回答 2021-11-18
66x(60+6)x99=(3960+396)x99
4356×(100-1)=435600-4356
=431244
4356×(100-1)=435600-4356
=431244
第2个回答 2021-11-19
66*99*66
=66*(100-1)*66
=(6600-66)*66
=6534*66
=431244
=66*(100-1)*66
=(6600-66)*66
=6534*66
=431244
第3个回答 2021-11-19
66×99×66
＝66×33×3×66
＝66×33×198
＝66×(200-2)×33
＝(66×200-66×2)×33
＝(13200-132)×33
＝13068×(30+3)
＝13068×30+13068×3
＝392040+39204
＝431244
＝66×33×3×66
＝66×33×198
＝66×(200-2)×33
＝(66×200-66×2)×33
＝(13200-132)×33
＝13068×(30+3)
＝13068×30+13068×3
＝392040+39204
＝431244
第4个回答 2021-11-19
66*（99+1）=66*100=6600
第5个回答 2021-11-19
66×100×66-66
=6600×66-66
=435600-66
=435534
=6600×66-66
=435600-66
=435534
