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怎样简便就怎样算.49.5×0.2+2.07÷231350+450÷15×2579÷115+29×511(0.75-316)×(29+13)14÷(3-513-813)[4-(34-38)]×429.

题目详情
怎样简便就怎样算.
49.5×0.2+2.07÷23
1350+450÷15×25
7
9
÷
11
5
+
2
9
×
5
11
(0.75-
3
16
)×(
2
9
+
1
3
1
4
÷(3-
5
13
-
8
13
[4-(
3
4
-
3
8
)]×
4
29
怎样简便就怎样算.
49.5×0.2+2.07÷23
1350+450÷15×25
7
9
÷
11
5
+
2
9
×
5
11
(0.75-
3
16
)×(
2
9
+
1
3
1
4
÷(3-
5
13
-
8
13
[4-(
3
4
-
3
8
)]×
4
29
怎样简便就怎样算.
49.5×0.2+2.07÷23 1350+450÷15×25
7
9
÷
11
5
+
2
9
×
5
11
怎样简便就怎样算.
49.5×0.2+2.07÷23
1350+450÷15×25
7
9
÷
11
5
+
2
9
×
5
11
7
9
÷
11
5
+
2
9
×
5
11
7
9
7799
11
5
+
2
9
×
5
11
11
5
111155
2
9
×
5
11
2
9
2299
5
11
5
11
551111 (0.75-
3
16
)×(
2
9
+
1
3
1
4
÷(3-
5
13
-
8
13
[4-(
3
4
-
3
8
)]×
4
29
(0.75-
3
16
)×(
2
9
+
1
3
3
16
)×(
2
9
+
1
3
3
16
331616
2
9
+
1
3
2
9
2299
1
3
1
3
1133
1
4
÷(3-
5
13
-
8
13
1
4
÷(3-
5
13
-
8
13
1
4
1144
5
13
-
8
13
5
13
551313
8
13
8
13
881313[4-(
3
4
-
3
8
)]×
4
29
3
4
-
3
8
)]×
4
29
3
4
3344
3
8
)]×
4
29
3
8
3388
4
29
4
29
442929
▼优质解答
答案和解析
(1)49.5×0.2+2.07÷23,
=9.9+0.09,
=9.99;

(2)1350+450÷15×25,
=1350+30×25,
=1350+750,
=2100;

(3)
7
9
÷
11
5
+
2
9
×
5
11

=
7
9
×
5
11
+
2
9
×
5
11

=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11


(4)(0.75-
3
16
)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
7
9
777999÷
11
5
+
2
9
×
5
11

=
7
9
×
5
11
+
2
9
×
5
11

=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11


(4)(0.75-
3
16
)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
11
5
111111555+
2
9
×
5
11

=
7
9
×
5
11
+
2
9
×
5
11

=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11


(4)(0.75-
3
16
)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
2
9
222999×
5
11

=
7
9
×
5
11
+
2
9
×
5
11

=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11


(4)(0.75-
3
16
)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
5
11
555111111,
=
7
9
×
5
11
+
2
9
×
5
11

=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11


(4)(0.75-
3
16
)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
7
9
777999×
5
11
+
2
9
×
5
11

=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11


(4)(0.75-
3
16
)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
5
11
555111111+
2
9
×
5
11

=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11


(4)(0.75-
3
16
)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
2
9
222999×
5
11

=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11


(4)(0.75-
3
16
)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
5
11
555111111,
=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11


(4)(0.75-
3
16
)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
7
9
777999+
2
9
222999)×
5
11

=1×
5
11

=
5
11


(4)(0.75-
3
16
)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
5
11
555111111,
=1×
5
11

=
5
11


(4)(0.75-
3
16
)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
5
11
555111111,
=
5
11


(4)(0.75-
3
16
)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
5
11
555111111;

(4)(0.75-
3
16
)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
3
16
333161616)×(
2
9
+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
2
9
222999+
1
3
),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
1
3
111333),
=(
3
4
-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
3
4
333444-
3
16
)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
3
16
333161616)×(
2
9
+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
2
9
222999+
3
9
),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
3
9
333999),
=(
12
16
-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
12
16
121212161616-
3
16
)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
3
16
333161616)×
5
9

=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
5
9
555999,
=
9
16
×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
9
16
999161616×
5
9

=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
5
9
555999,
=
5
16


(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
5
16
555161616;

(5)
1
4
÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
1
4
111444÷(3-
5
13
-
8
13
),
=
1
4
÷[3-(
5
13
555131313-
8
13
),
=
1
4
÷[3-(
8
13
888131313),
=
1
4
÷[3-(
1
4
111444÷[3-(