Maths practice for 11-year-olds. - page 140 of 222

Number of problems found: 4427

Density of the concrete
If the weight of the cuboid-shaped column is 200 kg, find the density of the concrete with dimensions 20 x 20 cm x 2 m.
Tractors
Five tractors will plow the field for 8 hours. In 2 hours, one tractor broke down. How long do the remaining tractors complete the plow?
Difference in temperatures
The temperature in the number line shows minus 15 degrees celsius and 8-degree celsius. What is the difference between the temperatures?
Largest 6886
There are two cubes. One has an edge of 9 dm and the second of 9 cm. How often does the largest cube have a larger volume than a smaller one?
Sum of fractions
What is the sum of 2/3+3/5?
Reciprocal equation 3
Solve a reciprocal equation: 1/2 + 2/3=1/x
Equatiom
Solve equation with negatives: X/(-5) + 2 = -9
Trevor
Trevor wishes to tile the floor of his bathroom. The bathroom is rectangular and is 4.2m long and 3.3m wide. The tiles are 30cm by 30cm. Calculate the cost to tile the floor if each tile costs 72 cents.
After 2
After we planted flowers in 2/5 of our garden, 24m remained unplanted. How many meters is the garden in total? If the total area of the garden is 1, what is the proportion of the remaining area?
Equation 29
Solve the next equation: 2 ( 2x + 3 ) = 8 ( 1 - x) -5 ( x -2 )
Sewing
The lady cut off one-half of the cloth. She needed three-quarters of this piece to sew a skirt. What part of the original piece of cloth remained?
Expression
Solve for a specified variable: P=a+4b+3c, for a
Comparing and sorting
Arrange in descending order these fractions: 2/7, 7/10 & 1/2
Maria
Maria has decided to plant grapes in the garden behind her house. His neighbor Ben has grown grapes successfully for a long time and has given Maria advice on how to plant vines. Ben told her to plant them 3 meters apart in rows and 3 meters apart. Maria
Expression 8
Evaluate this expressions: a) 5[3 + 4(2.8 - 3)] b) 5×(8-4)÷4-2
Simple equation 5
Solve the equation with fractions: X × 3/8 = 1/2
Symbols
If 2*3 = 60 ; 3*4 = 120 and 4*5 = 200, what is 2*5?
Fe metal sheet
5/8 of the metal sheet is consumed for one product, and the second 5/6 remains. What part of the sheet metal is needed for both products together?
My father
My father has a big farm. He planted 6/8 of it with mango trees, 1/2 of the remainder are guava trees, and the remaining 10 trees are santol trees. What is the number of all trees?
School
There are 150 pupils in the 5A class. 2/3 of them are female. By what fractions are the males?

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