问题
解答题
用简便方法计算:
(1)1.23452+0.76552+0.469×0.7655
(2)1234567892-123456788×123456790
答案
(1)原式=1.23452+0.7655(0.7655+0.469)
=1.23452+0.7655×1.2345
=1.2345×(1.2345+0.7655)
=1.2345×2
=2.469;
(2)原式=1234567892-(1234567892-12)
=1234567892-1234567892+12,
=1.