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计算下列各题,要写出主要计算过程,能用简便方法的要用简便方法计算.①16×18-120÷15②3.2×2.77+0.23×3.2③7.6-2.05÷0.82④78-517+98-1217⑤29-716×29⑥13÷(14+56)×34.
题目详情
计算下列各题,要写出主要计算过程,能用简便方法的要用简便方法计算.
①16×18-120÷15 ②3.2×2.77+0.23×3.2 ③7.6-2.05÷0.82 ①16×18-120÷15 ②3.2×2.77+0.23×3.2 ③7.6-2.05÷0.82 ④
-
+
-
⑤
-
×
⑥13÷(
+
)×
. ④
-
+
-
-
+
-
7 7 8 8
+
-
5 5 17 17
-
9 9 8 8
12 12 17 17 ⑤
-
×
-
×
2 2 9 9
×
7 7 16 16
2 2 9 9 ⑥13÷(
+
)×
.
+
)×
.
1 1 4 4
)×
.
5 5 6 6
.
3 3 4 4
| ①16×18-120÷15 | ②3.2×2.77+0.23×3.2 | ③7.6-2.05÷0.82 | ||||||||||||||||||||
④
| ⑤
| ⑥13÷(
|
| ①16×18-120÷15 | ②3.2×2.77+0.23×3.2 | ③7.6-2.05÷0.82 | ||||||||||||||||||||
④
| ⑤
| ⑥13÷(
|
| 7 |
| 8 |
| 5 |
| 17 |
| 9 |
| 8 |
| 12 |
| 17 |
| 2 |
| 9 |
| 7 |
| 16 |
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| 9 |
| 1 |
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| 9 |
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| 2 |
| 9 |
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| 2 |
| 9 |
| 2 |
| 9 |
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| 2 |
| 9 |
| 7 |
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| 2 |
| 9 |
| 2 |
| 9 |
| 1 |
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▼优质解答
答案和解析
①16×18-120÷15,
=288-8,
=280;
②3.2×2.77+0.23×3.2,
=3.2×(2.77+0.23),
=3.2×3,
=9.6;
③7.6-2.05÷0.82,
=7.6-2.5,
=5.1;
④
-
+
-
,
=(
+
)-(
+
),
=2-1,
=1;
⑤
-
×
,
=
×(1-
),
=
×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
7 7 78 8 8-
+
-
,
=(
+
)-(
+
),
=2-1,
=1;
⑤
-
×
,
=
×(1-
),
=
×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
5 5 517 17 17+
-
,
=(
+
)-(
+
),
=2-1,
=1;
⑤
-
×
,
=
×(1-
),
=
×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
9 9 98 8 8-
,
=(
+
)-(
+
),
=2-1,
=1;
⑤
-
×
,
=
×(1-
),
=
×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
12 12 1217 17 17,
=(
+
)-(
+
),
=2-1,
=1;
⑤
-
×
,
=
×(1-
),
=
×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
7 7 78 8 8+
)-(
+
),
=2-1,
=1;
⑤
-
×
,
=
×(1-
),
=
×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
9 9 98 8 8)-(
+
),
=2-1,
=1;
⑤
-
×
,
=
×(1-
),
=
×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
5 5 517 17 17+
),
=2-1,
=1;
⑤
-
×
,
=
×(1-
),
=
×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
12 12 1217 17 17),
=2-1,
=1;
⑤
-
×
,
=
×(1-
),
=
×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
2 2 29 9 9-
×
,
=
×(1-
),
=
×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
7 7 716 16 16×
,
=
×(1-
),
=
×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
2 2 29 9 9,
=
×(1-
),
=
×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
2 2 29 9 9×(1-
),
=
×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
7 7 716 16 16),
=
×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
2 2 29 9 9×
,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
9 9 916 16 16,
=
;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
1 1 18 8 8;
⑥13÷(
+
)×
,
=13÷
×
,
=12×
,
=9.
1 1 14 4 4+
)×
,
=13÷
×
,
=12×
,
=9.
5 5 56 6 6)×
,
=13÷
×
,
=12×
,
=9.
3 3 34 4 4,
=13÷
×
,
=12×
,
=9.
13 13 1312 12 12×
,
=12×
,
=9.
3 3 34 4 4,
=12×
,
=9.
3 3 34 4 4,
=9.
①16×18-120÷15,
=288-8,
=280;
②3.2×2.77+0.23×3.2,
=3.2×(2.77+0.23),
=3.2×3,
=9.6;
③7.6-2.05÷0.82,
=7.6-2.5,
=5.1;
④
| 7 |
| 8 |
| 5 |
| 17 |
| 9 |
| 8 |
| 12 |
| 17 |
=(
| 7 |
| 8 |
| 9 |
| 8 |
| 5 |
| 17 |
| 12 |
| 17 |
=2-1,
=1;
⑤
| 2 |
| 9 |
| 7 |
| 16 |
| 2 |
| 9 |
=
| 2 |
| 9 |
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 7 |
| 8 |
| 5 |
| 17 |
| 9 |
| 8 |
| 12 |
| 17 |
=(
| 7 |
| 8 |
| 9 |
| 8 |
| 5 |
| 17 |
| 12 |
| 17 |
=2-1,
=1;
⑤
| 2 |
| 9 |
| 7 |
| 16 |
| 2 |
| 9 |
=
| 2 |
| 9 |
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 5 |
| 17 |
| 9 |
| 8 |
| 12 |
| 17 |
=(
| 7 |
| 8 |
| 9 |
| 8 |
| 5 |
| 17 |
| 12 |
| 17 |
=2-1,
=1;
⑤
| 2 |
| 9 |
| 7 |
| 16 |
| 2 |
| 9 |
=
| 2 |
| 9 |
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 9 |
| 8 |
| 12 |
| 17 |
=(
| 7 |
| 8 |
| 9 |
| 8 |
| 5 |
| 17 |
| 12 |
| 17 |
=2-1,
=1;
⑤
| 2 |
| 9 |
| 7 |
| 16 |
| 2 |
| 9 |
=
| 2 |
| 9 |
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 12 |
| 17 |
=(
| 7 |
| 8 |
| 9 |
| 8 |
| 5 |
| 17 |
| 12 |
| 17 |
=2-1,
=1;
⑤
| 2 |
| 9 |
| 7 |
| 16 |
| 2 |
| 9 |
=
| 2 |
| 9 |
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 7 |
| 8 |
| 9 |
| 8 |
| 5 |
| 17 |
| 12 |
| 17 |
=2-1,
=1;
⑤
| 2 |
| 9 |
| 7 |
| 16 |
| 2 |
| 9 |
=
| 2 |
| 9 |
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 9 |
| 8 |
| 5 |
| 17 |
| 12 |
| 17 |
=2-1,
=1;
⑤
| 2 |
| 9 |
| 7 |
| 16 |
| 2 |
| 9 |
=
| 2 |
| 9 |
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 5 |
| 17 |
| 12 |
| 17 |
=2-1,
=1;
⑤
| 2 |
| 9 |
| 7 |
| 16 |
| 2 |
| 9 |
=
| 2 |
| 9 |
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 12 |
| 17 |
=2-1,
=1;
⑤
| 2 |
| 9 |
| 7 |
| 16 |
| 2 |
| 9 |
=
| 2 |
| 9 |
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 2 |
| 9 |
| 7 |
| 16 |
| 2 |
| 9 |
=
| 2 |
| 9 |
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 7 |
| 16 |
| 2 |
| 9 |
=
| 2 |
| 9 |
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 2 |
| 9 |
=
| 2 |
| 9 |
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 2 |
| 9 |
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 7 |
| 16 |
=
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 2 |
| 9 |
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 9 |
| 16 |
=
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 1 |
| 8 |
⑥13÷(
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 1 |
| 4 |
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 5 |
| 6 |
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 3 |
| 4 |
=13÷
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 13 |
| 12 |
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 3 |
| 4 |
=12×
| 3 |
| 4 |
=9.
| 3 |
| 4 |
=9.
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