简便计算51×0.51━0.5

简便计算51×0.51━0.5
2025-03-21 01:20:45
推荐回答(3个)
回答1:

解:51×0.51━0.5
=51×(0.5+0.01)-0.5
=51×0.5+51×0.01-1×0.5
=(51-1)×0.5+51×0.01
=50×0.5+0.51
=25+0.51
=25.51

回答2:

51×0.51━0.5=(50+1)*0.51-0.5=25.5+0.51-0.5=25.51

回答3:

51×0.51-0.5
51×0.51-0.51+0.01
=(51-1)×0.51+0.01
=50×0.51+0.01
=25.5+0.01
=25.51