题目内容

脱式计算
(1)(28×
7
4
+12×175%)÷
21
8

(2)16×18+16×80+98×84
(3)1
1
3
-
7
12
+
9
20
-
11
30
+
13
42
-
15
56
+
17
72
-
19
90

(4)
4
9
÷(
5
6
-
1
2
)×(
7
8
-
1
2

(5)
1
4
×(4.85÷
5
18
-3.6+6.15×3
3
5
)

(6)10÷[
8
3
-(
5
13
÷
5
26
+
2
5
)].
(1)(28×
7
4
+12×175%)÷
21
8

=(49+21)×
8
21

=70×
8
21

=
80
3

(2)16×18+16×80+98×84
=288+1280+8232,
=9800;
(3)1
1
3
-
7
12
+
9
20
-
11
30
+
13
42
-
15
56
+
17
72
-
19
90

=
4
3
-7×(
1
3
-
1
4
)+9×(
1
4
-
1
5
)-11×(
1
5
-
1
6
)+13×(
1
6
-
1
7
)-15×(
1
7
-
1
8
)+17×(
1
8
-
1
9
)-19×(
1
9
-
1
10

=
4
3
-
7
3
+
7
4
+
9
4
-
9
5
-
11
5
+
11
6
+
13
6
-
13
7
-
15
7
+
15
8
+
17
8
-
17
9
-
19
9
+
19
10

=(
4
3
+
7
4
+
9
4
+
11
6
+
13
6
+
15
8
+
17
8
+
19
10
)-(
7
3
+
9
5
+
11
5
+
13
7
+
15
7
+
17
9
+
19
9
),
=(
4
3
+4+4+4+
19
10
)-(
7
3
+4+4+4),
=
4
3
+
19
10
-
7
3

=
9
10

(4)
4
9
÷(
5
6
-
1
2
)×(
7
8
-
1
2

=
4
9
÷
1
3
×
3
8

=
1
2

(5)
1
4
×(4.85÷
5
18
-3.6+6.15×3
3
5
)

=
1
4
×(
97
20
×
18
5
-
18
5
+
123
20
×
18
5
),
=
1
4
×[(
97
20
+
123
20
-1)×
18
5
],
=
1
4
×[10×
18
5
],
=
1
4
×36,
=9.
(6)10÷[
8
3
-(
5
13
÷
5
26
+
2
5
)]
=10÷[
8
3
-
12
5
],
=10×
15
4

=
75
2
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