Rate and Speed
Ricky can type 500 words in 10 minutes. How many words can he type in 1 minute?
50 words
60% of 200 is?
120
The sum of r and 8
r+8 / 8+r
The sum of r and 8 is 15.5. What is r?
r=7.5
Kathy runs 3m per second. How far can she run for 30 minutes?
5400m
There are 300 apples in the shop. 30% of the apples are red apples. How many red apples are there?
90 red apples
Subtract 50 by y
50 - y
Lily has 20 books. She buys more books and has 25 books at the end. How many books does she buy?
Steven is driving a car. He drives 5 min from home to park at a speed of 900m per minute. Then drive 2 min form park to the library at a speed of 500km per minute. What's the total distance he drives in km?
5.5km
In the shop, the total number of red apples and green apples are 200. 30% of them are red apples and the rest are green apples. How many green apples are there?
140 green apples
Rio is k years old. His father's age is 4 times of his age. The sum of their age is m. If k represents Rio's age, express m in terms of k. And tell me the independent variable and dependent variable.
Equation: m=5k
Independent Variable: k
Dependent Variable: m
Bobby has some money. He spends $30 on food, $13 for drinks, and has $51 left. How much does he have at the beginning?
$94
Lily's speed is 300m/min. Kitty's speed is 90% of Lily's speed. How many minutes does it take for Kitty to run 1215m?
4.5 min
Emma is planning how to use the $1000. She uses 20% of them to buy food, save 40% of the remainder. And spend all the rest for Taobao. How much is she spends on Taobao?
$480
The price of a marker is $e. The price of a pen is half of marker. If the price of a pen is $r, express r in terms of e. And tell the independent and dependent variable.
Equation: r=e/2
Independent Variable: e
Dependent Variable: r
Steven has some candies. He gives 4/5 of the candies to his students, and eats 3 candies. He has 5 candies left. How many candies does he has at the beginning?
40 candies