Ответ:
\(15\cdot3=45\); \(80:5=16\); \(13\cdot6=78\); \(570+430=1000\); \(100-31=69\); \(52:2=26\).
Ответ: 45; 16; 78; 1000; 69; 26.
\(15\cdot3=45\); \(80:5=16\); \(13\cdot6=78\); \(570+430=1000\); \(100-31=69\); \(52:2=26\).
Ответ: 45; 16; 78; 1000; 69; 26.