Question

Calculati folosind scoaterea unui factor comun

57+57x85

80x45+45

27x108-27 Rapid 45 puncte

Answer 1

57 + 57 × 85 = 57 × ( 1 + 85 ) = 57 × 86 = 4 902

80 × 45 + 45 = 45 × ( 80 + 1 ) = 45 × 81 = 3 645

27 × 108 - 27 = 27 × ( 108 - 1 ) = 27 × 107 = 2 889

Answer 2

57+57x85=57(1+85)=57x86=4902

80x45+45=45(80+1)=45x81=3645

27x108-27=27(108-1)=27x107=2889