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用简便方法计算125×8.81.3+4.25+3.7+3.754.8×1.0117.16-(3.5-2.85)3.4×99+3.41321×17+1721×8725×1001779÷115+511×2964.2×87+64.2×13.
题目详情
用简便方法计算
125×8.8 1.3+4.25+3.7+3.75 4.8×1.01 125×8.8 1.3+4.25+3.7+3.75 4.8×1.01 17.16-(3.5-2.85) 3.4×99+3.4
×17+
×8 17.16-(3.5-2.85) 3.4×99+3.4
×17+
×8
×17+
×8
13 13 21 21
17 17 21 21
×100
÷
+
×
64.2×87+64.2×13.
×100
×100
7 7 25 25
1 1 7 7
÷
+
×
÷
+
×
7 7 9 9
11 11 5 5
5 5 11 11
2 2 9 9 64.2×87+64.2×13.
125×8.8 | 1.3+4.25+3.7+3.75 | 4.8×1.01 | ||||||||||||
17.16-(3.5-2.85) | 3.4×99+3.4 |
| ||||||||||||
|
| 64.2×87+64.2×13. |
125×8.8 | 1.3+4.25+3.7+3.75 | 4.8×1.01 | ||||||||||||
17.16-(3.5-2.85) | 3.4×99+3.4 |
| ||||||||||||
|
| 64.2×87+64.2×13. |
13 |
21 |
17 |
21 |
13 |
21 |
17 |
21 |
13 |
21 |
17 |
21 |
13 |
21 |
17 |
21 |
7 |
25 |
1 |
7 |
7 |
9 |
11 |
5 |
5 |
11 |
2 |
9 |
7 |
25 |
1 |
7 |
7 |
25 |
1 |
7 |
7 |
25 |
1 |
7 |
7 |
9 |
11 |
5 |
5 |
11 |
2 |
9 |
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9 |
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▼优质解答
答案和解析
(1)125×8.8,
=125×8×1.1,
=1000×1.1,
=1100;
(2)1.3+4.25+3.7+3.75,
=(1.3+3.7)+(4.25+3.75),
=5+8,
=13;
(3)4.8×1.01,
=4.8×1+4.8×0.01,
=4.8+0.048,
=4.848;
(4)17.16-(3.5-2.85),
=17.16+2.85-3.5,
=20.01-3.5,
=16.51;
(5)3.4×99+3.4,
=3.4×(99+1),
=3.4×100,
=340;
(6)
×17+
×8,
=(
+
)×17,
=1×17,
=17;
(7)
×100
,
=
×100+
×
,
=28+
,
=28
;
(8)
÷
+
×
,
=(
+
)×
,
=1×
,
=
;
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
13 13 1321 21 21×17+
17 17 1721 21 21×8,
=(
+
)×17,
=1×17,
=17;
(7)
×100
,
=
×100+
×
,
=28+
,
=28
;
(8)
÷
+
×
,
=(
+
)×
,
=1×
,
=
;
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
13 13 1321 21 21+
8 8 821 21 21)×17,
=1×17,
=17;
(7)
×100
,
=
×100+
×
,
=28+
,
=28
;
(8)
÷
+
×
,
=(
+
)×
,
=1×
,
=
;
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
7 7 725 25 25×100
1 1 17 7 7,
=
×100+
×
,
=28+
,
=28
;
(8)
÷
+
×
,
=(
+
)×
,
=1×
,
=
;
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
7 7 725 25 25×100+
7 7 725 25 25×
1 1 17 7 7,
=28+
,
=28
;
(8)
÷
+
×
,
=(
+
)×
,
=1×
,
=
;
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420. +
1 1 125 25 25,
=28
;
(8)
÷
+
×
,
=(
+
)×
,
=1×
,
=
;
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
1 1 125 25 25;
(8)
÷
+
×
,
=(
+
)×
,
=1×
,
=
;
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
7 7 79 9 9÷
11 11 115 5 5+
5 5 511 11 11×
2 2 29 9 9,
=(
+
)×
,
=1×
,
=
;
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
7 7 79 9 9+
2 2 29 9 9)×
,
=1×
,
=
;
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
5 5 511 11 11,
=1×
,
=
;
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
5 5 511 11 11,
=
;
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
5 5 511 11 11;
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
=125×8×1.1,
=1000×1.1,
=1100;
(2)1.3+4.25+3.7+3.75,
=(1.3+3.7)+(4.25+3.75),
=5+8,
=13;
(3)4.8×1.01,
=4.8×1+4.8×0.01,
=4.8+0.048,
=4.848;
(4)17.16-(3.5-2.85),
=17.16+2.85-3.5,
=20.01-3.5,
=16.51;
(5)3.4×99+3.4,
=3.4×(99+1),
=3.4×100,
=340;
(6)
13 |
21 |
17 |
21 |
=(
13 |
21 |
8 |
21 |
=1×17,
=17;
(7)
7 |
25 |
1 |
7 |
=
7 |
25 |
7 |
25 |
1 |
7 |
=28+
1 |
25 |
=28
1 |
25 |
(8)
7 |
9 |
11 |
5 |
5 |
11 |
2 |
9 |
=(
7 |
9 |
2 |
9 |
5 |
11 |
=1×
5 |
11 |
=
5 |
11 |
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
13 |
21 |
17 |
21 |
=(
13 |
21 |
8 |
21 |
=1×17,
=17;
(7)
7 |
25 |
1 |
7 |
=
7 |
25 |
7 |
25 |
1 |
7 |
=28+
1 |
25 |
=28
1 |
25 |
(8)
7 |
9 |
11 |
5 |
5 |
11 |
2 |
9 |
=(
7 |
9 |
2 |
9 |
5 |
11 |
=1×
5 |
11 |
=
5 |
11 |
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
13 |
21 |
8 |
21 |
=1×17,
=17;
(7)
7 |
25 |
1 |
7 |
=
7 |
25 |
7 |
25 |
1 |
7 |
=28+
1 |
25 |
=28
1 |
25 |
(8)
7 |
9 |
11 |
5 |
5 |
11 |
2 |
9 |
=(
7 |
9 |
2 |
9 |
5 |
11 |
=1×
5 |
11 |
=
5 |
11 |
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
7 |
25 |
1 |
7 |
=
7 |
25 |
7 |
25 |
1 |
7 |
=28+
1 |
25 |
=28
1 |
25 |
(8)
7 |
9 |
11 |
5 |
5 |
11 |
2 |
9 |
=(
7 |
9 |
2 |
9 |
5 |
11 |
=1×
5 |
11 |
=
5 |
11 |
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
7 |
25 |
7 |
25 |
1 |
7 |
=28+
1 |
25 |
=28
1 |
25 |
(8)
7 |
9 |
11 |
5 |
5 |
11 |
2 |
9 |
=(
7 |
9 |
2 |
9 |
5 |
11 |
=1×
5 |
11 |
=
5 |
11 |
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420. +
1 |
25 |
=28
1 |
25 |
(8)
7 |
9 |
11 |
5 |
5 |
11 |
2 |
9 |
=(
7 |
9 |
2 |
9 |
5 |
11 |
=1×
5 |
11 |
=
5 |
11 |
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
1 |
25 |
(8)
7 |
9 |
11 |
5 |
5 |
11 |
2 |
9 |
=(
7 |
9 |
2 |
9 |
5 |
11 |
=1×
5 |
11 |
=
5 |
11 |
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
7 |
9 |
11 |
5 |
5 |
11 |
2 |
9 |
=(
7 |
9 |
2 |
9 |
5 |
11 |
=1×
5 |
11 |
=
5 |
11 |
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
7 |
9 |
2 |
9 |
5 |
11 |
=1×
5 |
11 |
=
5 |
11 |
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
5 |
11 |
=1×
5 |
11 |
=
5 |
11 |
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
5 |
11 |
=
5 |
11 |
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
5 |
11 |
(9)64.2×87+64.2×13.
=64.2×(87+13),
=64.2×100,
=6420.
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