Question

这些题怎样简便计算

Answer 1

956-371-29
=956-(371+29)
=956-400
=556

68×45+55×68
=68×(45+55)
=68×100
=6800

756+432+44
=756+44+432
=800+432
=1232

125×32×25
=(125×8)×(25×4)
=1000×100
=100000

89×99
=89×(100-1)
=89×100-89
=8900-89
=8811

72×102
=72×(100+2)
=72×100+72×2
=7200+144
=7344

345×108-45×108
=(345-45)×108
=300×108
=32400
请采纳谢谢

Answer 2

=956-（371+29）
=956-400
=556

追答

=68×（55+45）
=68×100
=6800

=756+44+432
=800+432
=1232

=125×（8×4）×25
=125×8×（4×25）
=1000×100
=100000

=89×（99+1-1）
=89×100-89
=8900-89
=8911

=72×(102-2+2)
=72×100-72×2
=7200-144
=7056

=108×（345-45）
=108×300
=32400

Answer 3

Answer 4

忒简单