Maths practice for 12-year-olds - page 99 of 355
Number of problems found: 7086
- Cube seat fabric
How much fabric will be needed to cover 12 cube-shaped seats with a 40cm edge? - Cube edge creation From how many cubes with a 4 cm edge can a cube with a 16 cm edge be created?
- Temperature - change
The thermometer showed -2 °C in the morning. By lunch, the temperature had risen by 5°C. The temperature had dropped by 13°C till midnight. What temperature in °C did the thermometer show at midnight? - Digit number difference
The digits 1, 2, 4, and 8 form two four-digit numbers so that all 4 digits are used in the notation of each number. Calculate the difference between such largest even number and smallest odd number (in that order). - Number divisor list List all compound positive two-digit numbers whose greatest common divisor with the number 51 is the number 17.
- Number divisible list List all divisible numbers by six and seven that are greater than 79 and less than 91.
- Grandma 9
Grandma bought 2 kilograms of apples at a crowns per kilogram, 5 kg of potatoes at b crowns per kilogram, and one celery for 12 crowns. She paid with three fifty crowns. o Depending on the quantities a, b, express the amount in crowns that was returned to - Number sum comparison
How many times is the number 0.045 greater than the sum of 0.006 and 0.003? - Fraction comparison times
How many times is twice one-third larger than one-ninth? - Difference of squares
How many times is the difference between the squares of numbers 4 and 2 bigger than the square of their difference (in this order)? - Fraction equality box
Write the assignment in a fraction. Fill in the number in the box so that the equality applies: (Write the result as a fraction in the base form.) (1 1/3 - 3/4) · ___ = 1/2 - Fraction equality box Write the assignment in a fraction. Fill in the number in the box so that the equality applies: (Write the result as a fraction in the base form.) 3 · ___ + 1/4 = 5/8
- Number product fraction Write one-sixth product of the numbers 4.8 and 0.4 as a fraction in the basic form.
- Number square comparison
Calculate how many times the square of the number 1/100 is less than 1/1000. (numbers in fraction form) - Number comparison times
Calculate how many times ten-hundredths are less than five-tenths. - Consecutive number smallest The sum of five consecutive natural numbers is 75. What is the smallest of these numbers?
- Bucket
Kim and Joey share a 30-ounce bucket of clay. By the end of the week, Kim has used 3/10 of the bucket. Joey has used 3/5 of the bucket of clay. How many ounces are left in the bucket? - Ava filled
Ava filled three cups with different amounts of water: 225 ml, 370 ml, and 435 ml. Which of the following is the total amount of water, in liters, that Ava used to fill the three cups? - A seller
A seller sliced some pizza into eights. After selling 57 slices, seven slices were left. How many whole pizzas did the vendor slice? - Four-sided prism
Find the surface area and volume of a four-sided prism high 10cm if its base is a rectangle measuring 6cm and 1.4dm.
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