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Paranteze rotunde
(42:6)×(32:8)=
(72:9)×(14:2)=
(35:5)×(45:5)=
(56:7)×(30:5)=

Răspuns :

(42:6)×(32:8)= 7×4= 28

(72:9)×(14:2)= 8×7= 56

(35:5)×(45:5)= 7×9= 63

(56:7)×(30:5)= 8×6= 48