Ответ:
а) \[279 + 117 = 396\]
\[396 : 3 = 132\]
\[132 \cdot 4 = 528\]
\[528 - 66 = 462\]
б) \[67 \cdot 7 = 469\]
\[469 - 124 = 345\]
\[345 : 3 = 115\]
\[115 + 543 = 658\]
Ответ: а) 396, 132, 528, 462; б) 469, 345, 115, 658.
а) \[279 + 117 = 396\]
\[396 : 3 = 132\]
\[132 \cdot 4 = 528\]
\[528 - 66 = 462\]
б) \[67 \cdot 7 = 469\]
\[469 - 124 = 345\]
\[345 : 3 = 115\]
\[115 + 543 = 658\]
Ответ: а) 396, 132, 528, 462; б) 469, 345, 115, 658.