3道递等式计算(能巧算的巧算) 1.(125*17+125*29)*8 2,(25*97+75)*24

问题描述:

3道递等式计算(能巧算的巧算) 1.(125*17+125*29)*8 2,(25*97+75)*24

(125*17+125*29)*8
=125*17*8+125*29*8
=1000*17+1000*29
=1000*(17+29)
=46000
(25*97+75)*24
=(25*97+25*3)*24
=25*(97+3)*24
=25*4*6*100
=100*6*100
=60000