Maths practice for 12-year-olds - page 279 of 362
Number of problems found: 7228
- Parenthesis: 4144
Solve a simple equation with a minus before the parenthesis: 4x- (x-4) = 5-3x - 1000000 4135
1000000 seconds. How many days is it? - Summands
Find two summands of the number 42 so that its product is minimized. - Installation 4123
The team of installers is to carry out the installation in 20 days. By adding two fitters from the beginning of the work, the assembly was completed in 15 days. How many were on the team? - Increased 4120
Which number increased by its seventh will give 32? - Fraction 4114
Express the fraction and decimal number of which part of the meter is: 120mm, 25cm, 7dm, 670mm, 48cm, 9.7dm. - Cruise liner
The cruise liner runs along the river between points A and B. The journey downstream takes 40 minutes and 1 hour upriver. The flow rate of the river is 3 km/h. What is the speed of a cruise liner?
- Pumps
Five pumps pumped 1,800 hl of water for 3 hours. How many hectoliters of water did the same two powerful pumps pump for six hours? - Girlfriends 4107
Four girlfriends want to take a photo together. How many different ways can they stand side by side? - Expression: 4100
Specify the value of this expression: (2-7) · 1012 - Cuboid surface
Determine the surface area of the cuboid if its volume is 52.8 cm cubic and the length of the two edges are 2 cm and 6 cm. - Cuboid - Vab
Find the surface of the cuboid when its volume is 52.8 cubic centimeters and the length of its two edges is 2 centimeters and 6 centimeters. - Equation
Find x: x + 1/2 = 1/3 - Calculate 4089
Calculate and perform the test. 3a / 2 + 5/6 = a / 3 - 3/2 - Surface of wall
Find by what percentage the cube's surface will decrease if we reduce the surface of each of its walls by 12%.
- Centimeters 4081
Determine the wall and body diagonal of the cube, with the surface of one of its walls being 121 square centimeters. - Unknown number
I think the number - its sixth is three smaller than its third. - Diameter 4078
What is the diameter of the wheel when it turns 455 times per 1 km? They rounded to the nearest cm. - Simple equation
Solve for x: 3(x + 2) = x - 18 - Efficiency 4073
Determine the efficiency of a vacuum cleaner with a power input of 1.2 kW when the suction power is 360 W.
Do you have unsolved problem that you need help? Ask a question, and we will try to solve it. Solving math problems.
