Question

777✘9 111✘37要简算？

Answer 1

解：
777×9＝700×9＋70×9＋7×9
111×37＝100×37＋10×37＋1×37

Answer 2

777×9
=777×（10-1）
=777×10-777×1
=7770-777
=6993
111×37
=（100+10+1）×37
=100×37+10×37+1×37
=3700+370+37
=4107

Answer 3

777X9000十777X丨00十777X丨十777X9丨1|X37=6993000十77700十777=67070700十777二7071477

Answer 4

这是两道吗？
777×（10-1）=7770-777=6993
（100+10+1）×37 =3700+370+37=4070+37=4107