Mixed operations with parentheses Three cows and five sheep eat 74 kg of grass a day, five cows and three sheep eat 70 kg of grass a day, and how many kg of grass do one cow and one sheep eat a day?

Mixed operations with parentheses Three cows and five sheep eat 74 kg of grass a day, five cows and three sheep eat 70 kg of grass a day, and how many kg of grass do one cow and one sheep eat a day?

Should be:
(74 + 70) divided by (3 + 5 + 5 + 3) = 9 (kg)
A: a cow and a sheep eat 9 kg of grass a day

What is the function of parentheses in four mixed operations?

The number in the small scratch number is calculated first, and then the scratch number is opened after the result is obtained, and then the number outside (inside the large scratch number) is calculated, and then the large scratch number is opened after the result is obtained Turn on the squeegee layer by layer

The four mixed operations of fractions are the same as (), which are first (), then (), with brackets (), and the final result

The four mixed operations of fractions are the same as those of integers. They are all calculated first (multiplication and division), then (addition and subtraction), and those with brackets (first in brackets), and the final result