Question

7777乘9加1111乘37的简便运算？

Answer 1

7777*9+1111*37=1111*(7*9+37)=1111*(63+37)=111100

Answer 2

7777×9+1111×37=1111×7×9+1111×37=1111×（7×9+37）=1111×100=111100

Answer 3

1111x7x9+1111x37=1111(63+37)=1111x100=111100

Answer 4

乘法分配律为：两个数的和与一个数相乘，先将它们与这个数分别相乘，再相加，积不变．即：（a+b）×c=a×c+b×c．反过来则：a×c+b×c=（a+b）×c
7777 ×9+1111 ×37
= 7×1111 ×9+1111×37
= 1111 × ( 7×9+37)
= 1111×100
= 111100