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计算,能简算的要简算.517÷9+19×121712×99+12.

题目详情
计算,能简算的要简算.
5
17
÷9+
1
9
×
12
17
                   12×99+12.

5
17
÷9+
1
9
×
12
17
                   12×99+12.
5
17
551717
1
9
×
12
17
                   12×99+12.
1
9
1199
12
17
                   12×99+12.
12
17
12121717
▼优质解答
答案和解析
(1)
5
17
÷9+
1
9
×
12
17

=
5
17
×
1
9
+
1
9
×
12
17

=(
5
17
+
12
17
)×
1
9

=1×
1
9

=
1
9


(2)12×99+12,
=(99+1)×12,
=100×12,
=1200.
5
17
555171717÷9+
1
9
×
12
17

=
5
17
×
1
9
+
1
9
×
12
17

=(
5
17
+
12
17
)×
1
9

=1×
1
9

=
1
9


(2)12×99+12,
=(99+1)×12,
=100×12,
=1200.
1
9
111999×
12
17

=
5
17
×
1
9
+
1
9
×
12
17

=(
5
17
+
12
17
)×
1
9

=1×
1
9

=
1
9


(2)12×99+12,
=(99+1)×12,
=100×12,
=1200.
12
17
121212171717,
=
5
17
×
1
9
+
1
9
×
12
17

=(
5
17
+
12
17
)×
1
9

=1×
1
9

=
1
9


(2)12×99+12,
=(99+1)×12,
=100×12,
=1200.
5
17
555171717×
1
9
+
1
9
×
12
17

=(
5
17
+
12
17
)×
1
9

=1×
1
9

=
1
9


(2)12×99+12,
=(99+1)×12,
=100×12,
=1200.
1
9
111999+
1
9
×
12
17

=(
5
17
+
12
17
)×
1
9

=1×
1
9

=
1
9


(2)12×99+12,
=(99+1)×12,
=100×12,
=1200.
1
9
111999×
12
17

=(
5
17
+
12
17
)×
1
9

=1×
1
9

=
1
9


(2)12×99+12,
=(99+1)×12,
=100×12,
=1200.
12
17
121212171717,
=(
5
17
+
12
17
)×
1
9

=1×
1
9

=
1
9


(2)12×99+12,
=(99+1)×12,
=100×12,
=1200.
5
17
555171717+
12
17
)×
1
9

=1×
1
9

=
1
9


(2)12×99+12,
=(99+1)×12,
=100×12,
=1200.
12
17
121212171717)×
1
9

=1×
1
9

=
1
9


(2)12×99+12,
=(99+1)×12,
=100×12,
=1200.
1
9
111999,
=1×
1
9

=
1
9


(2)12×99+12,
=(99+1)×12,
=100×12,
=1200.
1
9
111999,
=
1
9


(2)12×99+12,
=(99+1)×12,
=100×12,
=1200.
1
9
111999;

(2)12×99+12,
=(99+1)×12,
=100×12,
=1200.