150:10 = 40:10 + 50:1 = 15. Calculations on the image: 150 / 10 = 15; 40 / 10 = 4; 50 / 1 = 50; 4 + 50 = 54. The result 15 is written next to the equals sign on the left, and 54 would be the result of the right side. The numbers 40 and 5 are present.