Rezolvă, după model:
a) (52+56):4-(52:4) + (56:4) -
Afla
-13+14=
-27
b) (42:3) 4 (54: 3) =(42+54): 3-
96:3=
(70-35):5-
(48+72):3-
(81-45):3-
(56:4) + (64:4)=>
(75:5)-(65:5)=
(82:2)-(56:2) =
(96-72):4-
(84-78):6-
(65+70):5=
(78:6)+(84:6)=
(96:8)-(80:8) =
(84:4) + (76:4)