简便计算：10.1×4.5,12.5×32×2.5,24.75-3.75-6.25寻大侠和高手来解解这道题吧_数学解答

简便计算：10.1×4.5,12.5×32×2.5,24.75-3.75-6.25寻大侠和高手来解解这道题吧

人气：107 ℃　时间：2020-10-02 00:20:35

解答

10.1×4.5
=(10+0.1)×4.5
=10×4.5+0.1×4.5
=45+0.45
=10.45
12.5×32×2.5
=12.5×8×(4×2.5)
=100×10
=1000
24.75-3.75-6.25
=24.75-(3.75+6.25_
=24.75-10
=14.75