125-83-17用简便方法计算

用简便方法计算 125×48; 17×83+17×17; 0.82+1.7+8.3.
2025-03-22 10:51:51
推荐回答(1个)
回答1:

(1)125×48
=125×(40+8)
=125×40+125×8
=5000+1000
=6000;

(2)17×83+17×17
=17×(83+17)
=17×100
=1700;

(3)0.82+1.7+8.3
=0.82+(1.7+8.3)
=0.82+10
=10.82.