问题
解答题
简便计算
(1)43×29-19×43
(2)180.9-23.07-56.93
(3)32×25×125
(4)0.12+5.34+19.88+3.66
(5)276+276×99.
答案
(1)43×29-19×43
=(29-19)×43
=10×43
=430;
(2)180.9-23.07-56.93
=180.9-(23.07+56.93)
=180.9-80
=100.9;
(3)32×25×125
=8×4×25×125
=(8×125)×(4×25)
=1000×100
=100000;
(4)276+276×99
=(1+99)×276
=100×276
=27600.