Final answer:
To find the total number of chocolate cakes sold over the weekend, you can add the number of cakes sold on Saturday and Sunday together. The total number of chocolate cakes sold over the weekend is 98.
Step-by-step explanation:
To find the total number of chocolate cakes sold over the weekend, we can add the number of cakes sold on Saturday and Sunday together. On Saturday, 10 times 13 chocolate cakes were sold, which equals 130. On Sunday, 8 times (negative 4) chocolate cakes were sold. Multiplying these values gives us negative 32. To find the total number of chocolate cakes sold, we can add these two values together: 130 + (-32) = 98.