问题 解答题
用你喜欢的方法计算.
136×
2
135
2001×3.14+200.1×31.4+20.01×314
5
8
-[(
1
2
+
3
5
)×
5
11
]
333×334+999×222
1.25×17.6+36.1÷0.8+2.63×12.51
1
8
÷(
1
4
+2.5×
4
5
答案

(1)136×

2
135

=(135+1)×

2
135

=135×

2
135
+1×
2
135

=2+

2
135

=2

2
135

(2)2001×3.14+200.1×31.4+20.01×314

=2001×3.14+2001×3.14+2001×3.14,

=2001×3.14×3,

=(2000+1)×9.42,

=2000×9.42+1×9.42,

=18840+9.42,

=18849.42;

(3)

5
8
-[(
1
2
+
3
5
)×
5
11
]

=

5
8
-[
11
10
×
5
11
],

=

5
8
-
1
2

=

1
8

(4)333×334+999×222

=333×334+333×(3×222),

=333×334+333×666,

=333×(334+666),

=333×1000,

=333000.

(5)1.25×17.6+36.1÷0.8+2.63×12.5

=1.25×17.6+36.1×1.25+26.3×1.25,

=(17.6+36.1+26.3)×1.25,

=80×1.25,

=100;

(6)1

1
8
÷(
1
4
+2.5×
4
5

=1

1
8
÷(
1
4
+2),

=

9
8
÷
9
4

=

1
2

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