75+44+125+66+568×5×125×4078×45+21×45+4535×98.

2023-04-26

问题描述:

75+44+125+66+56 8×5×125×40
78×45+21×45+45 35×98.



最佳答案:

(1)75+44+125+66+56,
=(75+125)+(44+56)+66,
=200+100+66,
=366;

(2)8×5×125×40,
=(8×125)×(5×40),
=1000×200,
=200000;

(3)78×45+21×45+45,
=(78+21+1)×45,
=100×45,
=4500;

(4)35×98,
=35×(100-2),
=35×100-35×2,
=3500-70,
=3430.