Rational numbers - practice for 12 year olds - last page
Number of problems found: 178
- VAT
John paid 1000 Euros in store for purchase. Calculate value-added tax (VAT), which is paid in the purchase, if the VAT rate is 20%. - The tallest
The tallest building in the world used to be Taipei 101 in Taiwan. Its height is 0.509 km. The tallest building in North America was Sears Towers in Chicago, USA. Its height is 0.442 km. What is the difference in the heights of the buildings? - Cyclists 5827
Cyclists ran 3/7 of the total length during the race and had 80.5 km to finish. How long is the race? - Tom has
Tom has a water tank that holds 5 gallons of water. Tom uses water from a full tank to fill six bottles holding 16 ounces and a pitcher holding 1/2 gallon. How many ounces of water are left in the water tank?
- Motion
If you go at speed 5.5 km/h, you come to the station 33 minutes after leaving the train. If you bike to the station at speed 29 km/h, you come to the station 52 minutes before its departure. How far is the train station? - Blades
1st blade 2,5 m, 2nd blade. .1.75 m. How many can the same long pieces of these two blades do the biggest? How long is one piece? - Time
Write time in minutes rounded to one decimal place: 3 h 48 m 45 s. - Day
What part of the day is 23 hours 22 minutes? Express as a decimal number. - Acid
The barrel is 199 liters of 38% acid. How many percent of acids occur when 61 liters revoke and replaced with the same amount of water?
- Coffee
In-stock are three kinds of branded coffee prices: I. Kind. .. .. .205 Kc/kg II. Kind. .. .. .274 Kc/kg III. Kind. .. .. 168 Kc/kg Mixing these three species in the ratio 8:5:6 create a mixture. What will be the price of 100 grams of this mixture? - Madams
During the spring cleaning, ladies were going to wash the windows. Mother takes to wash all the windows 5 hours, the grandmother takes 3 times longer, and Paula washes all windows in 2 hours. How many hours will you spend washing the windows of this "wome - Motion2
The cyclist started off town at 19 km/h. The car started after 0.7 hours behind him in the same direction. It caught up with him for 23 minutes. How fast and how long went the car from the city to catch cyclists? - The temperature 33
The temperature in Baguio City was 18.6 degrees Celsius, while in Tagaytay City was 22.5 degrees Celsius. What was the estimated difference between the two cities' temperatures? A. 6 degree celcius B. 5 degree celcius C. 4 degree celcius D. 3 degree celci - Motion problem
From Levíc to Košíc, go car at speed 81 km/h. From Košíc to Levíc, go another car at speed 69 km/h. How many minutes before the meeting will be cars 27 km away?
- Pool
The swimming pool is 10 m wide and 8 m long, and 153 cm deep. How many hectoliters of water are in it if the water is 30 cm below its upper edge? - Two cars
Two cars started against each other simultaneously to journey long 346 km. The first car went 53 km/h and the second 53 km/h. What distance will be between these cars 20 minutes before a meeting? - Temperature 71534
In the morning, they measured the temperature at 5.7 degrees Celsius. What will the temperature be when: A) warms by 6.3 degrees Celsius B) cools by 0.9 degrees Celsius C) cools down by 9 degrees Celsius and immediately warms up by 18.8 degrees Celsius D) - Peroxide
How much-distilled water (in liters) must pharmacists pour into 300 ml of 23.6% solution of hydrogen peroxide to get 2.7% solution to gargle?
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