861 - 364 = (a)  

376 + 256 = (a)  

685 - 458 = (a)  

36 × 12 = (a)  

123 × 45 = (a)  

392 ÷ 7 = (a)  

576 ÷ 12 = (a)  

(12 × 8) + 4 = (a)  

72 - (36 ÷ 3) = (a)