A-A+
计算下面各题(能简算的要简算).807×99+807;[1-(12-14)]×25;20.0
问题详情
计算下面各题(能简算的要简算).
807×99+807;
[1-(
20.01×83+1.7×200.1;
(1.5+2
参考答案
(1)807×99+807
=807×(99+1)
=807×100
=807;
(2)[1-(12-14)]×25
=[1-14]×25
=34×25
=310;
(3)20.01×83+1.7×200.1
=20.01×(83+17)
=20.01×100
=2001;
(4)(1.5+223)÷3.75-23
=416÷3.75-23
=119-23
=49;
(5)65×38+58÷56
=65×(38+58)
=65×1
=115.
考点: