第1个回答 2023-05-13
解:3×128×125×25
=384×125×25
=(400-16)×25×125
=(400×25-16×25)×125
=(10000-400)×125
=9600×(100+25)
=9600×100+9600×25
=960000+240000
=1200000
第2个回答 2023-05-13
原式=3×16000×25
=3×400000
=1200000.
第3个回答 2023-05-13
3*128*125*25
=3*(100+20+8)*125*25
=3*(12500+2500+1000)*25
=3*16000*5*5
=3*80000*5
=3*400000
=1200000