问题 解答题
脱式计算(能简算的要简算).
(1)99×99+99
(2)[(
3
20
+2.1)×
4
7
]÷0.9

(3)8÷8÷0.125
(4)37×39-29×37
(5)1.8÷2.7÷0.6×2.7
(6)0.5+[
5
6
÷(0.15+
9
20
)]
答案

(1)99×99+99,

=99×(99+1),

=99×100,

=9900;

(2)[(

3
20
+2.1)×
4
7
]÷0.9,

=[2.25×

4
7
]÷0.9,

=

9
7
×
10
9

=

10
7

(3)8÷8÷0.125,

=1÷0.125,

=8;

(4)37×39-29×37,

=37×(39-29),

=37×10,

=370;

(5)1.8÷2.7÷0.6×2.7,

=1.8×

1
2.7
×
1
0.6
×2.7,

=(1.8×

1
0.6
)×(2.7×
1
2.7
),

=3×1,

=3;

(6)0.5+[

5
6
÷(0.15+
9
20
)],

=0.5+[

5
6
÷
12
20
],

=0.5+

25
18

=

17
9

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