Question

76X69十32X69一69=？

76X69十32x69一69＝

Answer 1

答案为7383。
将69提出来：
（76+32-1）69=107x69
将69化为70-1方便运算:
107x（70-1）=7490-107=7383

Answer 2

76×69+32×69-69=69×（76+32-1）=69×107=7383

Answer 3

76x69+32x69-69
解：=69x(76+32-1)
=69x107
=69x(100+7)
=69x100+69x7
=6900+483
=7383