28 times 9 equals 252, which means about 252 grams of sugar is needed.
252 divided by 1000 equals 0.252kg solution: let Dongdong age be x.
X times 5=x+48
5x=x+48
4x=48
X=48 divided by 4
x= 1
A: Dongdong 12 years old, and Grandpa is 60 years old. Brother, such a simple question can be done by elementary school students. I'm only in grade five.