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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)
−0.8+
(2)2.5×4.4
(3)14
−7.75−2
(4)3.76×5
+3.76+3
×3.76.
−0.8+
(2)2.5×4.4
(3)14
−7.75−2
(4)3.76×5
+3.76+3
×3.76.
5 5 11 11
6 6 11 11
14
−7.75−2
(4)3.76×5
+3.76+3
×3.76.
6 6 13 13
1 1 4 4
3.76×5
+3.76+3
×3.76.
4 4 7 7
3 3 7 7
(1)
5 |
11 |
6 |
11 |
(2)2.5×4.4
(3)14
6 |
13 |
1 |
4 |
(4)3.76×5
4 |
7 |
3 |
7 |
5 |
11 |
6 |
11 |
(2)2.5×4.4
(3)14
6 |
13 |
1 |
4 |
(4)3.76×5
4 |
7 |
3 |
7 |
5 |
11 |
6 |
11 |
14
6 |
13 |
1 |
4 |
(4)3.76×5
4 |
7 |
3 |
7 |
6 |
13 |
1 |
4 |
3.76×5
4 |
7 |
3 |
7 |
4 |
7 |
3 |
7 |
▼优质解答
答案和解析
(1)
−0.8+
,
=
+
−0.8,
=1-0.8,
=0.2;
(2)2.5×4.4,
=2.5×4+2.5×0.4,
=10+1,
=11;
(3)14
−7.75− 2
,
14
−(7.75+2.25),
=14
−10,
=4
;
(4)3.76×5
+3.76+3
×3.76,
=3.76×(5
+3
+1),
=3.76×10,
=37.6.
5 5 511 11 11−0.8+
,
=
+
−0.8,
=1-0.8,
=0.2;
(2)2.5×4.4,
=2.5×4+2.5×0.4,
=10+1,
=11;
(3)14
−7.75− 2
,
14
−(7.75+2.25),
=14
−10,
=4
;
(4)3.76×5
+3.76+3
×3.76,
=3.76×(5
+3
+1),
=3.76×10,
=37.6. +
6 6 611 11 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
−7.75− 2
,
14
−(7.75+2.25),
=14
−10,
=4
;
(4)3.76×5
+3.76+3
×3.76,
=3.76×(5
+3
+1),
=3.76×10,
=37.6.
5 5 511 11 11+
6 6 611 11 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
−7.75− 2
,
14
−(7.75+2.25),
=14
−10,
=4
;
(4)3.76×5
+3.76+3
×3.76,
=3.76×(5
+3
+1),
=3.76×10,
=37.6. 14
6 6 613 13 13−7.75− 2
,
14
−(7.75+2.25),
=14
−10,
=4
;
(4)3.76×5
+3.76+3
×3.76,
=3.76×(5
+3
+1),
=3.76×10,
=37.6. − 2
1 1 14 4 4,
14
−(7.75+2.25),
=14
−10,
=4
;
(4)3.76×5
+3.76+3
×3.76,
=3.76×(5
+3
+1),
=3.76×10,
=37.6. 14
6 6 613 13 13−(7.75+2.25),
=14
−10,
=4
;
(4)3.76×5
+3.76+3
×3.76,
=3.76×(5
+3
+1),
=3.76×10,
=37.6. 14
6 6 613 13 13−10,
=4
;
(4)3.76×5
+3.76+3
×3.76,
=3.76×(5
+3
+1),
=3.76×10,
=37.6. 4
6 6 613 13 13;
(4)3.76×5
+3.76+3
×3.76,
=3.76×(5
+3
+1),
=3.76×10,
=37.6. 5
4 4 47 7 7+3.76+3
×3.76,
=3.76×(5
+3
+1),
=3.76×10,
=37.6. 3
3 3 37 7 7×3.76,
=3.76×(5
+3
+1),
=3.76×10,
=37.6. 5
4 4 47 7 7+3
3 3 37 7 7+1),
=3.76×10,
=37.6.
5 |
11 |
6 |
11 |
=
5 |
11 |
6 |
11 |
=1-0.8,
=0.2;
(2)2.5×4.4,
=2.5×4+2.5×0.4,
=10+1,
=11;
(3)14
6 |
13 |
1 |
4 |
14
6 |
13 |
=14
6 |
13 |
=4
6 |
13 |
(4)3.76×5
4 |
7 |
3 |
7 |
=3.76×(5
4 |
7 |
3 |
7 |
=3.76×10,
=37.6.
5 |
11 |
6 |
11 |
=
5 |
11 |
6 |
11 |
=1-0.8,
=0.2;
(2)2.5×4.4,
=2.5×4+2.5×0.4,
=10+1,
=11;
(3)14
6 |
13 |
1 |
4 |
14
6 |
13 |
=14
6 |
13 |
=4
6 |
13 |
(4)3.76×5
4 |
7 |
3 |
7 |
=3.76×(5
4 |
7 |
3 |
7 |
=3.76×10,
=37.6. +
6 |
11 |
=
5 |
11 |
6 |
11 |
=1-0.8,
=0.2;
(2)2.5×4.4,
=2.5×4+2.5×0.4,
=10+1,
=11;
(3)14
6 |
13 |
1 |
4 |
14
6 |
13 |
=14
6 |
13 |
=4
6 |
13 |
(4)3.76×5
4 |
7 |
3 |
7 |
=3.76×(5
4 |
7 |
3 |
7 |
=3.76×10,
=37.6.
5 |
11 |
6 |
11 |
=1-0.8,
=0.2;
(2)2.5×4.4,
=2.5×4+2.5×0.4,
=10+1,
=11;
(3)14
6 |
13 |
1 |
4 |
14
6 |
13 |
=14
6 |
13 |
=4
6 |
13 |
(4)3.76×5
4 |
7 |
3 |
7 |
=3.76×(5
4 |
7 |
3 |
7 |
=3.76×10,
=37.6. 14
6 |
13 |
1 |
4 |
14
6 |
13 |
=14
6 |
13 |
=4
6 |
13 |
(4)3.76×5
4 |
7 |
3 |
7 |
=3.76×(5
4 |
7 |
3 |
7 |
=3.76×10,
=37.6. − 2
1 |
4 |
14
6 |
13 |
=14
6 |
13 |
=4
6 |
13 |
(4)3.76×5
4 |
7 |
3 |
7 |
=3.76×(5
4 |
7 |
3 |
7 |
=3.76×10,
=37.6. 14
6 |
13 |
=14
6 |
13 |
=4
6 |
13 |
(4)3.76×5
4 |
7 |
3 |
7 |
=3.76×(5
4 |
7 |
3 |
7 |
=3.76×10,
=37.6. 14
6 |
13 |
=4
6 |
13 |
(4)3.76×5
4 |
7 |
3 |
7 |
=3.76×(5
4 |
7 |
3 |
7 |
=3.76×10,
=37.6. 4
6 |
13 |
(4)3.76×5
4 |
7 |
3 |
7 |
=3.76×(5
4 |
7 |
3 |
7 |
=3.76×10,
=37.6. 5
4 |
7 |
3 |
7 |
=3.76×(5
4 |
7 |
3 |
7 |
=3.76×10,
=37.6. 3
3 |
7 |
=3.76×(5
4 |
7 |
3 |
7 |
=3.76×10,
=37.6. 5
4 |
7 |
3 |
7 |
=3.76×10,
=37.6.
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