Resources tagged with Calculating with ratio & proportion similar to Extending Fraction Bars:
Other tags that relate to Extending Fraction Bars
Equivalent fractions, decimals and percentages. Calculating with fractions. Generalising. Addition & subtraction. Trial and improvement. Factors and multiples. Fractions. Working systematically. Calculating with ratio & proportion. Multiplication & division.There are 20 results
Broad Topics > Fractions, Decimals, Percentages, Ratio and Proportion > Calculating with ratio & proportion
Once Upon a Time
Age 7 to 11 Challenge Level:
Can you work out the height of Baby Bear's chair and whose bed is whose if all the things the three bears have are in the same proportions?
Orange Drink
Age 7 to 11 Challenge Level:
A 750 ml bottle of concentrated orange squash is enough to make fifteen 250 ml glasses of diluted orange drink. How much water is needed to make 10 litres of this drink?
Cherry Buns
Age 7 to 11 Challenge Level:
Sam's grandmother has an old recipe for cherry buns. She has enough mixture to put 45 grams in each of 12 paper cake cases. What was the weight of one egg?
Hello Again
Age 11 to 14 Challenge Level:
Anne completes a circuit around a circular track in 40 seconds. Brenda runs in the opposite direction and meets Anne every 15 seconds. How long does it take Brenda to run around the track?
Tray Bake
Age 11 to 14 Challenge Level:
My recipe is for 12 cakes - how do I change it if I want to make a different number of cakes?
The Tree and the Greenhouse
Age 7 to 11 Challenge Level:
Mum, Dad, Tim and Jill moved into a new house. If they cut down the big tree, will it miss the greenhouse?
Number Lines in Disguise
Age 7 to 14 Challenge Level:
Some of the numbers have fallen off Becky's number line. Can you figure out what they were?
Do Unto Caesar
Age 11 to 14 Challenge Level:
At the beginning of the night three poker players; Alan, Bernie and Craig had money in the ratios 7 : 6 : 5. At the end of the night the ratio was 6 : 5 : 4. One of them won $1 200. What were the. . . .
Pumpkin Pie Problem
Age 7 to 11 Challenge Level:
Peter wanted to make two pies for a party. His mother had a recipe for him to use. However, she always made 80 pies at a time. Did Peter have enough ingredients to make two pumpkin pies?
Temperature
Age 11 to 14 Challenge Level:
Is there a temperature at which Celsius and Fahrenheit readings are the same?
How Random!
Age 7 to 11 Challenge Level:
Explore this interactivity and see if you can work out what it does. Could you use it to estimate the area of a shape?
Oh for the Mathematics of Yesteryear
Age 11 to 14 Challenge Level:
A garrison of 600 men has just enough bread ... but, with the news that the enemy was planning an attack... How many ounces of bread a day must each man in the garrison be allowed, to hold out 45. . . .
Square Pegs
Age 11 to 14 Challenge Level:
Which is a better fit, a square peg in a round hole or a round peg in a square hole?
Retiring to Paradise
Age 11 to 14 Challenge Level:
When Charlie retires, he's looking forward to the quiet life, whereas Alison wants a busy and exciting retirement. Can you advise them on where they should go?
Triathlon and Fitness
Age 11 to 14 Challenge Level:
The triathlon is a physically gruelling challenge. Can you work out which athlete burnt the most calories?
Toad in the Hole
Age 11 to 14 Challenge Level:
Is it cheaper to cook a meal from scratch or to buy a ready meal? What difference does the number of people you're cooking for make?
Straw Scaffold
Age 11 to 14 Challenge Level:
Build a scaffold out of drinking-straws to support a cup of water
NRICH is part of the family of activities in the Millennium Mathematics Project.