如题所述
第1个回答 2013-01-10
(40-8)*25
=32*25
=4*8*25
=(4*25)*8
=100*8
=800
或者
(40-8)*25
=40*25-8*25
=10*4*25-2*4*25
=10*100-2*100
=1000-200
=800
=32*25
=4*8*25
=(4*25)*8
=100*8
=800
或者
(40-8)*25
=40*25-8*25
=10*4*25-2*4*25
=10*100-2*100
=1000-200
=800
第2个回答 2013-01-10
两种做法:
(40-8)×25
=40×25-8×25
=1000-200
=800
(40-8)×25
=32×25
=8×4×25
=8×100
=800
(40-8)×25
=40×25-8×25
=1000-200
=800
(40-8)×25
=32×25
=8×4×25
=8×100
=800
第3个回答 2013-01-10
(40-8)*25=8*(5-1)*25=8*100=800
第4个回答 2013-01-10
(40-8)*25
=40*25-8*25
=10*4*25-2*4*25
=1000-200
=800
=40*25-8*25
=10*4*25-2*4*25
=1000-200
=800
第5个回答 2013-01-10
40×25-8×25=1000-200=800