先观察,再根据规律,把算式填完整.
(1)22-12=3 32-22=5 72-62=13 222- = 782- =
(2)
-
=3-
×2=
-
=7-
×4=
-
═ .
(1)22-12=3 32-22=5 72-62=13 222-
(2)
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