Question

157×78-52×78的简便运算怎么做？

Answer 1

157x78-52x78=（157-52）x78=105x78=8190

Answer 2

157×78-52×78＝78×(157-52)＝78×105＝8190

Answer 3

157X78-52X78
=（157-52）X78
=105X78
=（100+5）X78
=100X78+5X78
=7800+390
=8190

Answer 4

=78×(157－52)
=78×100+78×5
=7800+390
=8190

Answer 5

157×78－52×78
＝（157－52）×78
＝105×78
＝（100＋5）×78
＝100×78＋5×78
＝7800＋390
＝8190