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Calculați:b)7x11x13-1; c)28x73+27x28; d)31+144:(39-9:3)​

Răspuns :

Salutare!:)

7×11×13-1=

77×13-1=

1001-1=

1000

28×73+27×28=

2044+756=

2 800

31+144:(39-9:3)=

31+144:(39-3)=

31+144:36=

31+4=

35