Math Revision

Find the correct algebraic expression : Subtract k from 21

Find the correct algebraic expression: Multiply A by 36

Find the correct algebraic expression: Divide 8 by d

Ada has U dollars and she buys a robot. She got (a)   dollars after she bought the robot.

Mr Chan bought h remote control cars. He had to pay (a)   dollars in total

Toy guitar is E dollars more expensive than a plane model.

A toy guitar costs (a)   dollars.

Ken’s weight is 33  $$\frac{1}{4}$$ kg. Milly’s weight is  $$\frac{6}{7}$$ of that of Ken. What is Milly’s weight in kg?

A documentary film lasts for 2 $$\frac{1}{3}$$  hours. For how many minutes does it last? (Answer your final answer with unit)

(a)  

Among all Primary 5 students, every student participates in one (and only one) ball team. $$\frac{1}{5}$$ of the students joined the football team. $$\frac{5}{8}$$ of the students joined the basketball team and the volleyball team. What fraction of all Primary 5 students do not join any of the above?

Mum spent   $$8\frac{5}{12}$$ hours to sleep yesterday. She also spent $$1\frac{3}{5}$$  hours to watch television, that was $$1\frac{1}{4}$$ hours more than that for listening to music. How many more hours did she spend on sleeping than on listening to music?