推算.
|
(1)25 -17=___ |
(2)91 -85=___ |
|
15-7=___ |
91-5=___ |
|
95-7=___ |
11-5=___ |
推算.
|
(1)11 -2=___ |
(2)13 -6=___ |
(3)18 -9=___ |
|
31-2=___ |
23-16=___ |
68-9=___ |
|
31-12=___ |
53-16=___ |
68-29=___ |