问题 解答题
计算下面各题,能简算的要简算.
①0.45+0.45÷0.9×1.8
②9
5
11
-5
3
4
-2.25
③25×104
④0.625×4.3+
5
8
×4.7+62.5%
⑤(
1
10
+
1
6
)×10×6
3
8
×20-
3
8
×3-
3
8
答案

①0.45+0.45÷0.9×1.8,

=0.45+0.5×1.8,

=0.45+0.9,

=1.35;

②9

5
11
-5
3
4
-2.25,

=9

5
11
-(5.75+2.25),

=9

5
11
-8,

=1

5
11

③25×104,

=25×100+25×4,

=2500+100,

=2600;

④0.625×4.3+

5
8
×4.7+62.5%,

=0.625×(4.3+4.7+1),

=0.625×10,

=6.25;

⑤(

1
10
+
1
6
)×10×6,

=

1
10
×10×6+
1
6
×10×6

=6+10,

=16;

3
8
×20-
3
8
×3-
3
8

=

3
8
×(20-3-1),

=

3
8
×16,

=6.

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