88:22+15×6 = 88:22+90 = 88:112
65 : (213-200)×10 = 65 : 13×10 = 65 : 130
84 :12 ×(307-300) = 84 : 12 × 7 = 84 : 84
Therefore, the final result is 84 : 84.
88:22+15×6 = 88:22+90 = 88:112
65 : (213-200)×10 = 65 : 13×10 = 65 : 130
84 :12 ×(307-300) = 84 : 12 × 7 = 84 : 84
Therefore, the final result is 84 : 84.