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用简便方法计算.(1)511−0.8+611(2)2.5×4.4(3)14613−7.75−214(4)3.76×547+3.76+337×3.76.

题目详情
用简便方法计算.
(1)
5
11
−0.8+
6
11

(2)2.5×4.4
(3)14
6
13
−7.75−2
1
4

(4)3.76×5
4
7
+3.76+3
3
7
×3.76.

5
11
−0.8+
6
11

(2)2.5×4.4
(3)14
6
13
−7.75−2
1
4

(4)3.76×5
4
7
+3.76+3
3
7
×3.76.
5
11
551111
6
11
661111

14
6
13
−7.75−2
1
4

(4)3.76×5
4
7
+3.76+3
3
7
×3.76.
6
13
661313
1
4
1144
3.76×5
4
7
+3.76+3
3
7
×3.76.
4
7
4477
3
7
3377
▼优质解答
答案和解析
(1)
5
11
−0.8+
6
11

=
5
11
+
6
11
−0.8,
=1-0.8,
=0.2;

(2)2.5×4.4,
=2.5×4+2.5×0.4,
=10+1,
=11;

(3)14
6
13
−7.75− 2
1
4

14
6
13
−(7.75+2.25),
=14
6
13
−10,
=4
6
13


(4)3.76×5
4
7
+3.76+3
3
7
×3.76,
=3.76×(5
4
7
+3
3
7
+1),
=3.76×10,
=37.6.
5
11
555111111−0.8+
6
11

=
5
11
+
6
11
−0.8,
=1-0.8,
=0.2;

(2)2.5×4.4,
=2.5×4+2.5×0.4,
=10+1,
=11;

(3)14
6
13
−7.75− 2
1
4

14
6
13
−(7.75+2.25),
=14
6
13
−10,
=4
6
13


(4)3.76×5
4
7
+3.76+3
3
7
×3.76,
=3.76×(5
4
7
+3
3
7
+1),
=3.76×10,
=37.6.
+
6
11
666111111,
=
5
11
+
6
11
−0.8,
=1-0.8,
=0.2;

(2)2.5×4.4,
=2.5×4+2.5×0.4,
=10+1,
=11;

(3)14
6
13
−7.75− 2
1
4

14
6
13
−(7.75+2.25),
=14
6
13
−10,
=4
6
13


(4)3.76×5
4
7
+3.76+3
3
7
×3.76,
=3.76×(5
4
7
+3
3
7
+1),
=3.76×10,
=37.6.
5
11
555111111+
6
11
666111111−0.8,
=1-0.8,
=0.2;

(2)2.5×4.4,
=2.5×4+2.5×0.4,
=10+1,
=11;

(3)14
6
13
−7.75− 2
1
4

14
6
13
−(7.75+2.25),
=14
6
13
−10,
=4
6
13


(4)3.76×5
4
7
+3.76+3
3
7
×3.76,
=3.76×(5
4
7
+3
3
7
+1),
=3.76×10,
=37.6.
14
6
13
666131313−7.75− 2
1
4

14
6
13
−(7.75+2.25),
=14
6
13
−10,
=4
6
13


(4)3.76×5
4
7
+3.76+3
3
7
×3.76,
=3.76×(5
4
7
+3
3
7
+1),
=3.76×10,
=37.6.
− 2
1
4
111444,
14
6
13
−(7.75+2.25),
=14
6
13
−10,
=4
6
13


(4)3.76×5
4
7
+3.76+3
3
7
×3.76,
=3.76×(5
4
7
+3
3
7
+1),
=3.76×10,
=37.6.
14
6
13
666131313−(7.75+2.25),
=14
6
13
−10,
=4
6
13


(4)3.76×5
4
7
+3.76+3
3
7
×3.76,
=3.76×(5
4
7
+3
3
7
+1),
=3.76×10,
=37.6.
14
6
13
666131313−10,
=4
6
13


(4)3.76×5
4
7
+3.76+3
3
7
×3.76,
=3.76×(5
4
7
+3
3
7
+1),
=3.76×10,
=37.6.
4
6
13
666131313;

(4)3.76×5
4
7
+3.76+3
3
7
×3.76,
=3.76×(5
4
7
+3
3
7
+1),
=3.76×10,
=37.6.
5
4
7
444777+3.76+3
3
7
×3.76,
=3.76×(5
4
7
+3
3
7
+1),
=3.76×10,
=37.6.
3
3
7
333777×3.76,
=3.76×(5
4
7
+3
3
7
+1),
=3.76×10,
=37.6.
5
4
7
444777+3
3
7
333777+1),
=3.76×10,
=37.6.