题目内容

(1)61×
1
17
-1÷17×47+20÷17
=
(2)888×9-111×22=
(3)99999×7+11111×37=
(4)
4
9
-
4
9
÷2
=
(5)18÷
18
23
-
18
23
÷18
=
(1)61×
1
17
-1÷17×47+20÷17

=(61-47+20)×
1
17

=34×
1
17

=2;

(2)888×9-111×22,
=111×72-111×22,
=111×(72-22),
=111×50,
=5550;

(3)99999×7+11111×37,
=11111×63+11111×37,
=11111×(63+37),
=11111×100,
=1111100;

(4)
4
9
-
4
9
÷2

=4
1
2
-
2
9

=4
5
18


(5)18÷
18
23
-
18
23
÷18

=23-
1
23

=22
22
23
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