Natural numbers + subtraction - practice problems - page 5 of 8
Number of problems found: 151
- 5 2/5
5 2/5 hours a week mathematics, 3 3/4 hours a week Natural sciences, 4 3/8 hours a week Technology. How many hours does he spend on social sciences if he spends 17 1/2 hours a week on the four subjects? - Row for lunch
There are less than 66 people in a row for lunch. In front of Eva, there are 28 students. Behind Martin, there are 30 people. Between Eva and Martin, there are 17 people. How many students stand behind Eva if Martin stands in front of Eva? - Received 5582
Jirka, Petr, and Ondra earned 6480 CZK weekly at the gas station. Jirka received CZK 1958, Petr CZK 280 more than Jirka. How much did Ondra earn? - Aristotle 27401
Aristotle was born in 384 BC and lived to be 62 years old. In what year did he die? Plato lived to be 81 and died in 348 BC. What year was he born?
- 30 eggs
There are 30 eggs in a tray. How many eggs were left if 1/2 of the tray was used, 1/5 of it cooked, and 1/3 kept in the refrigerator? - Voting
Four hundred employees voted in a board member election with only two candidates. One hundred twenty people vote for candidate A, while half of the remaining voters abstain. How many votes does candidate B receive? - No. 215
From the number 215, we can create a four-digit number that, among its numbers, manually type any other digit. Thus, we created two four-digit numbers whose difference is 120. What two four-digit numbers might that be? - Calculate: 80736
Gaius Julius Caesar was born in 100 BC. He was murdered when he was 56 years old. Calculate: a) in what year was he murdered? b) How many years ago was he born? c) How many years ago did he die? - Already 34231
Every time it is Friday, Mom takes five apples. Friday has already taken place 18 times. How many apples does my mom have if she always ate only 1?
- At the 2
In the beginning, Kim has 25 cards. He then gave 11 cards to his friend. His cousin came over and gave him 17 cards. His uncle also came and gave him 18 cards. How many cards does he have now? - Tomatoes
There were 2414 crates of tomatoes in the barn, but 735 crates of tomatoes were rotten and had to be thrown out. Joe sold 813 crates and canned 756 crates of tomatoes. How many crates of tomatoes does Joe have left? - Students at cinema
All pupils from the school went to the cinema for a film performance. The cinema has 400 seats, and two rows of 20 seats remain unoccupied. Teachers occupied ten places. How many students were there? - Kindergarten 24141
The bookstore received a shipment of 420 new books. Of this, 1/10 was for elementary and kindergarten tours in Aš. How many books were left in the bookstore after the primary school and kindergarten tour in Aša books were taken away, and how many books we - Apples
Three types of apples are mixed in a box. What is the smallest number of apples we have to take from the box so that there are certainly at least three apples of the same kind among them? (Explain your solution!)
- Passengers 82638
The maximum take-off weight of the Concorde aircraft is 185,000 kg. What reserve does it have for fuel, passengers, and their luggage if the plane's weight is 78,900 kg? - Sophomores
There are 3200 students at lake high school, and 3/8 of these are sophomores. If 3/5 of the sophomores favor the school forming a crew team and 7/10 of the remaining students (not sophomores) are in favor of forming a crew team, how many students are oppo - Shirts
In a classroom,1/6 of the students wear blue shirts, and 2/3 wear white shirts. There are 18 students in the school. How many students are wearing shirts other than blue shirts or white shirts? - Free postage
Dad found out that when ordering goods over the Internet and will pay more than 60 euros, do not pay a fee for postal delivery. He chose goods for 10, 20 and 15 euros. How many euros do we have to pay for goods for free postage? - A five-digit
A five-digit odd number has the sum of all digits (digits) five and contains two zeros. If we move each digit in the number one place to the left and move the first digit to the last place, we get a number 20,988 smaller. Find this unknown five-digit numb
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