I don't think that you put parentheses around any numbers because when I solve it with parentheses between numbers I get other numbers like 16 or 17
5 units left and 7 units up
3/5 because it can't be 1/6 or 1/2 because they are 50% or smaller. Also it is 2/5 because if you count 20, 40, 60... up to 100 the third number is 50.
It’s k+1 Ply it in, multiply, combine.
2 bags. She needs to buy 2 bags of 10 pounds of potting soil.
20-13=7
2 more bags will give Marunne's father all the soil he needs and 7 pounds left over.