问题 解答题
灵活计算,能简便计算的要简算
3.4×5.9+5.9×6.654+99×99+45
11
9
-(
2
9
+
3
5
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

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