(258 + 693): 3 (185+590): 5 (455 + 189): 7 (378 +534): 6

To solve these calculations, simply divide the sum of the numbers by the divisor. Here are the solutions:

(258 + 693) ÷ 3 = 951 ÷ 3 = 317

(185 + 590) ÷ 5 = 775 ÷ 5 = 155

(455 + 189) ÷ 7 = 644 ÷ 7 = 92

(378 + 534) ÷ 6 = 912 ÷ 6 = 152