Adding - examples - page 8

1. Water colors Painting workshop attend 10 students. Eight students painted water colors and nine painted with tempera colors. How many students painted water colors and tempera at the same time?
2. Z9–I–4 MO 2017 Numbers 1, 2, 3, 4, 5, 6, 7, 8 and 9 were prepared for a train journey with three wagons. They wanted to sit out so that three numbers were seated in each carriage and the largest of each of the three was equal to the sum of the remaining two. The conducto
3. Identity 123456789 = 100 Use only three plus or minus characters to correct previous identity/equation.
4. Three numbers How much we increases the sum of three numbers when the first enlarge by 14, second by 15 and third by 16? Choose any three two-digit numbers and prove results.
5. Seals There are 10 seals on floe. a) On Wednesday arrived a six and departed 2 seals. How many seals are on the floe? b) on Thursday arrived a 5 seals more then departed. How many seals are on the floe?
6. Raspberries Dano had 20 raspberries. John had 90% more raspberries than Dano. Determine how many raspberries have Dano and Juraj together.
7. Tulips and daffodils Farm cultivated tulips and 211 units on 50 units more daffodils. How many spring flowers grown together?
8. Three cubes The body was created by gluing three identical cubes. Its volume is 192 cm3. What is its surface in dm2?
9. Shoes 4 Belinda's shoe is 12.45 centimeters long. Felix's shoe is 2.8 centimeters longer than Belinda's shoe. In centimeters, what is the combined length of their two shoes?
10. Resultant force Calculate mathematically and graphically the resultant of a three forces with a common centre if: F1 = 50 kN α1 = 30° F2 = 40 kN α2 = 45° F3 = 40 kN α3 = 25°
11. Sum of members What is the sum of the first two members of the aritmetic progression if d = -4.3 and a3 = 7.5?
12. Swallows 7 swallows 8 tits and 8 sparrows sitting on a wire. How many total flyoff bird sitting on a wire?
13. Skiing Ski gondola starts at a distance of 975 m from the top and is 389 meters long. I went to the bottom station to the top station. How many meters I must go to the top of hill?
14. Imaginary numbers Find two imaginary numbers whose sum is a real number. How are the two imaginary numbers related? What is its sum?
15. Series and sequences Find a fraction equivalent to the recurring decimal? 0.435643564356
16. Thermometer thermometer showed -12 degrees Celsius at the morning then the temperature rises by 4 degrees and later again increased by 2 degrees at the evening has fallen by 5 degrees and then fall 3 degrees. What end temperature does the thermometer show?
17. Summands Find two summands of the number 42, so that its product is minimized.
18. House numbering The residential house has three entrances numbered even numbers, successive immediately behind. The sum of the two numbers on the outside entrances is 68. Calculate the middle of these three numbers.
19. Expression 6 Evaluate expression: -6-2(4-8)-9
20. Grandma Grandma bought two 10 pack of eggs. She used 8 eggs on the cake, 2 times less on the omelette and 4 more eggs for breakfast. How many eggs did it stand for?

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