(1)7×11+7=84 (2)56÷8×9=63 (3)34÷17+34=36
(4)200÷5×8=320 (5)12×50-100=500 (6)180-99+1=82
(7)
2
7 +
1
7 =
3
7 (8)
6
23 +
17
23 =1 (9)
1
2 +
1
16 =
9
16
(10)1-
7
13 =
6
13 (11)
4
5 -
1
5 =
3
5 (12)
11
16 -
3
16 =
1
2 .
(1)7×11+7=84 (2)56÷8×9=63 (3)34÷17+34=36
(4)200÷5×8=320 (5)12×50-100=500 (6)180-99+1=82
(7)
2
7 +
1
7 =
3
7 (8)
6
23 +
17
23 =1 (9)
1
2 +
1
16 =
9
16
(10)1-
7
13 =
6
13 (11)
4
5 -
1
5 =
3
5 (12)
11
16 -
3
16 =
1
2 .