Math practice for 13 year olds - page 23 of 435
Number of problems found: 8682
- Estimate and exact
A) estimate 0.34 x 0.063 by rounding both numbers to one significant figure b) work out the exact value of 0.34 x 0.063 compare answers to parts a) and b) - Sqrt of sum
Find one-third of the square root of 81, the sum of 12, and the product of 3 and 12. - Linda
Linda gave her sister 2/5 of her money, spent 1/3, and saved the remainder. If Linda saved $28.00, how much money did she have at first? - Dostaneli If we get 5% of the amount that Petr has in his wallet and 4% of the amount that Paul has with him, we will have 46 CZK. However, if we get 4% from Peter's and 5% from Paul's, we will only have 44 CZK. How many crowns do Petr and Paul have with them?
- Twice squared
If the square of twice a number is 81, what is the number? Give a positive number x. - There 35
There are three points on a straight line: A, BC. If CD = 8x, DE = 3, and CE = x + 10, what is CD? Simplify your answer and write it as a proper fraction, mixed number, or integer. - Can you
Can you help me solve this math problem? I need to know the answer after multiplying 2 2/3 by 2 1/4 and then adding 1 2/3 divided by 1 4/5. Thank you in advance for your assistance.
- Comparing by height
Ira is 1 2/5 m tall. Her mother is 4/5 m as tall as Ira. How many times is Ira's mother taller than her? - X intercept
Given: 3y+2x=-6 Calculate the X-intercept. - Bookshelf 3
How many 1/35-inch thick books can fit on a 1 4/12-inch long bookshelf? - The painter
Alex had 5/6 liter of white paint. He used 1/8 of it to paint the walls and 2/5 of the remaining to paint the fence. How much paint is left? - Solution mg/ml
If 70 ml of solution contains 280mg of drug, how many milligrams of drugs are in 50 ml of solution? - Fresh chickens
In the market, one stall is selling fresh chickens worth P120 per kilo. A person bought two fresh chickens weighing 1 1/2 and 1 1/4 kilos each. What is the total weight of the two chickens? - Library and gym
In a town, 7/8 of the population has a library card, and 3/4 has a gym membership. What fraction of the population has either a library card or a gym membership? - Convert 8
Convert 11/2 into a percent?
- Eggs in basket
If the eggs in a basket are removed twice at a time, one will remain. Two eggs will remain if the eggs are removed three at a time. If the eggs are removed four, five, or six at a time, the three, four, and five eggs will remain, respectively. However, no - A piece 13
A piece of plank 2 1/2 cm thick is glued to another piece, which is 1 3/4 cm thick, to form a tabletop. Find the thickness of the tabletop if the glue used is 1/5 cm thick. primary school - A coin Suppose you tossed a coin 12 times. The coin landed on heads 9 times and on tail 3 times. What is the probability of landing on tails?
- The average 11
The average of a set of 7 numbers is 20. The average of a second set of 13 numbers is 40. What is the mean of all 20? - Complete 16
Complete the conversions below, show calculations and answers 1) 3.5 kg to gram 2) 4567ml to litres 3) R45.78 to cent 4) 5.60m to centimeters
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