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用简便方法计算(1)22×5556+22×156(2)1+44×17÷11÷34(3)(57-23)÷521×5(4)2012÷201220122013.

题目详情
用简便方法计算
(1)22×
55
56
+22×
1
56

(2)1+44×17÷11÷34
(3)(
5
7
-
2
3
)÷
5
21
×5
(4)2012÷2012
2012
2013

55
56
+22×
1
56

(2)1+44×17÷11÷34
(3)(
5
7
-
2
3
)÷
5
21
×5
(4)2012÷2012
2012
2013
55
56
55555656
1
56

(2)1+44×17÷11÷34
(3)(
5
7
-
2
3
)÷
5
21
×5
(4)2012÷2012
2012
2013
1
56
115656

5
7
-
2
3
)÷
5
21
×5
(4)2012÷2012
2012
2013
5
7
5577
2
3
)÷
5
21
×5
(4)2012÷2012
2012
2013
2
3
2233
5
21
×5
(4)2012÷2012
2012
2013
5
21
552121
2012
2013
2012
2013
2012201220132013
▼优质解答
答案和解析
(1)22×
55
56
+22×
1
56

=22
55
56
+
1
56

=22×1,
=22;

(2)1+44×17÷11÷34,
=1+44×17×
1
11
×
1
34

=1+2,
=3;

(3)(
5
7
-
2
3
)÷
5
21
×5,
=(
5
7
2
3
)×
21
5
×5,
=
5
7
×21−
2
3
×21,
=15-14,
=1;
(4)2012÷2012
2012
2013

=2012÷
2012×2013+2012
2013

=2012÷
2012×(2013+1)
2013

=2012×
2013
2012×(2013+1)

=
2013
2013+1

=
2013
2014
55
56
555555565656+22×
1
56

=22
55
56
+
1
56

=22×1,
=22;

(2)1+44×17÷11÷34,
=1+44×17×
1
11
×
1
34

=1+2,
=3;

(3)(
5
7
-
2
3
)÷
5
21
×5,
=(
5
7
2
3
)×
21
5
×5,
=
5
7
×21−
2
3
×21,
=15-14,
=1;
(4)2012÷2012
2012
2013

=2012÷
2012×2013+2012
2013

=2012÷
2012×(2013+1)
2013

=2012×
2013
2012×(2013+1)

=
2013
2013+1

=
2013
2014
1
56
111565656,
=22
55
56
+
1
56

=22×1,
=22;

(2)1+44×17÷11÷34,
=1+44×17×
1
11
×
1
34

=1+2,
=3;

(3)(
5
7
-
2
3
)÷
5
21
×5,
=(
5
7
2
3
)×
21
5
×5,
=
5
7
×21−
2
3
×21,
=15-14,
=1;
(4)2012÷2012
2012
2013

=2012÷
2012×2013+2012
2013

=2012÷
2012×(2013+1)
2013

=2012×
2013
2012×(2013+1)

=
2013
2013+1

=
2013
2014
55
56
555555565656+
1
56
111565656,
=22×1,
=22;

(2)1+44×17÷11÷34,
=1+44×17×
1
11
×
1
34

=1+2,
=3;

(3)(
5
7
-
2
3
)÷
5
21
×5,
=(
5
7
2
3
)×
21
5
×5,
=
5
7
×21−
2
3
×21,
=15-14,
=1;
(4)2012÷2012
2012
2013

=2012÷
2012×2013+2012
2013

=2012÷
2012×(2013+1)
2013

=2012×
2013
2012×(2013+1)

=
2013
2013+1

=
2013
2014
1
11
111111111×
1
34
111343434,
=1+2,
=3;

(3)(
5
7
-
2
3
)÷
5
21
×5,
=(
5
7
2
3
)×
21
5
×5,
=
5
7
×21−
2
3
×21,
=15-14,
=1;
(4)2012÷2012
2012
2013

=2012÷
2012×2013+2012
2013

=2012÷
2012×(2013+1)
2013

=2012×
2013
2012×(2013+1)

=
2013
2013+1

=
2013
2014
5
7
555777-
2
3
)÷
5
21
×5,
=(
5
7
2
3
)×
21
5
×5,
=
5
7
×21−
2
3
×21,
=15-14,
=1;
(4)2012÷2012
2012
2013

=2012÷
2012×2013+2012
2013

=2012÷
2012×(2013+1)
2013

=2012×
2013
2012×(2013+1)

=
2013
2013+1

=
2013
2014
2
3
222333)÷
5
21
×5,
=(
5
7
2
3
)×
21
5
×5,
=
5
7
×21−
2
3
×21,
=15-14,
=1;
(4)2012÷2012
2012
2013

=2012÷
2012×2013+2012
2013

=2012÷
2012×(2013+1)
2013

=2012×
2013
2012×(2013+1)

=
2013
2013+1

=
2013
2014
5
21
555212121×5,
=(
5
7
2
3
)×
21
5
×5,
=
5
7
×21−
2
3
×21,
=15-14,
=1;
(4)2012÷2012
2012
2013

=2012÷
2012×2013+2012
2013

=2012÷
2012×(2013+1)
2013

=2012×
2013
2012×(2013+1)

=
2013
2013+1

=
2013
2014
5
7
555777−
2
3
222333)×
21
5
×5,
=
5
7
×21−
2
3
×21,
=15-14,
=1;
(4)2012÷2012
2012
2013

=2012÷
2012×2013+2012
2013

=2012÷
2012×(2013+1)
2013

=2012×
2013
2012×(2013+1)

=
2013
2013+1

=
2013
2014
21
5
212121555×5,
=
5
7
×21−
2
3
×21,
=15-14,
=1;
(4)2012÷2012
2012
2013

=2012÷
2012×2013+2012
2013

=2012÷
2012×(2013+1)
2013

=2012×
2013
2012×(2013+1)

=
2013
2013+1

=
2013
2014
5
7
555777×21−
2
3
222333×21,
=15-14,
=1;
(4)2012÷2012
2012
2013

=2012÷
2012×2013+2012
2013

=2012÷
2012×(2013+1)
2013

=2012×
2013
2012×(2013+1)

=
2013
2013+1

=
2013
2014
2012
2013
201220122012201320132013.
=2012÷
2012×2013+2012
2013

=2012÷
2012×(2013+1)
2013

=2012×
2013
2012×(2013+1)

=
2013
2013+1

=
2013
2014
2012×2013+2012
2013
2012×2013+20122012×2013+20122012×2013+2012201320132013,
=2012÷
2012×(2013+1)
2013

=2012×
2013
2012×(2013+1)

=
2013
2013+1

=
2013
2014
2012×(2013+1)
2013
2012×(2013+1)2012×(2013+1)2012×(2013+1)201320132013,
=2012×
2013
2012×(2013+1)

=
2013
2013+1

=
2013
2014
2013
2012×(2013+1)
2013201320132012×(2013+1)2012×(2013+1)2012×(2013+1),
=
2013
2013+1

=
2013
2014
2013
2013+1
2013201320132013+12013+12013+1,
=
2013
2014
2013
2014
201320132013201420142014.