问题
解答题
灵活计算,能简便计算的要简算
|
答案
(1)3.4×5.9+5.9×6.6,
=(3.4+6.6)×5.9,
=10×5.9,
=59;
(2)54+99×99+45,
=(54+45)+99×99,
=99+99×99,
=99×(1+99),
=99×100,
=9900;
(3)
-(11 9
+2 9
),3 5
=
-11 9
-2 9
,3 5
=1-
,3 5
=
.2 5