Addition practice problems - page 21 of 78

Number of problems found: 1554

Department age groups
The department has 90 members. There are 4 more older adults in the section than younger adults. There are 10 more older pupils than all adults. How many older and younger teenagers and how many older pupils are there in the section?
Arithmetic sequence indices
In which arithmetic sequence is the sum of the first five terms with odd indices equal to 85 and the sum of the first five terms with even indices equal to 100?
Sequence sum formula
Two arithmetic sequences have the same first term. The nth term of the first sequence is 15, and of the second sequence, 21. The sum of the first n terms of the first sequence is 63, and of the second sequence, 84. Write the sums of the first n terms of b
Arithmetic sequence sum
In which arithmetic sequence is S5=S6=60?
Aquarium water total
The zoo purchased two aquariums for marine animals. The first can hold 3,577 liters of water. The second aquarium can hold 455 liters less water than the first. How many liters of water can the aquariums hold together?
Pinocchio nose length
Pinocchio's nose is 11 cm long. If he lies, it will be extended by 10 cm. If he tells the truth, he will be 7 cm shorter. Pinocchio lied 6 times and told the truth 8 times. How long is his nose now?
Dice sum probability
What is the probability that a roll of three dice will result in a number less than 7?
Triangle angle determination
In one triangle, one angle is 43°, and the second is 15° less than the third. Determine the unknown angles of the triangle.
Remainder even sum
If we divide numbers by a divisor of 15, we get several different remainders. Write the sum of all possible even remainders that we get this way.
Fraction addition division
Add one-third to five-eighths and divide the result by the sum of the numbers five-quarters and two-thirds.
Natural number sum
Calculate the sum of the squares of single-digit natural numbers less than 6
Quadrilateral angle sizes
In the general quadrilateral ABCD, angle β is 9° greater than angle α, angle γ is 24° greater than angle α, and angle δ is 50° greater than angle β. Determine the sizes of individual angles.
Aja book pages
Little Aja planned to read the book, which has 120 pages, for 4 days. On the first day, she read a quarter of the whole book; on the second day, she had training and therefore only read two-fifteenths of the book; on the third day, she read seven-twentiet
Consecutive number sum
The sum of three consecutive numbers is 18. What are the numbers?
Number sum product
Calculate the difference between the sum and product of the numbers -7 and -2.
Quadrilateral and angles
In a quadrilateral, angle α is twice as large as angle β. Angle γ is 80% of angle α, and angle δ is 30° greater than angle α. Determine the angles of this quadrilateral.
Order squares total
The total number of orders processed in the courier office in five days is 10, 6, 8, 7, 9, then the total of Squares is ...
Observation mean sum
The number of observations is 24, and the value of the mean is 28, then the sum of all the values is ...
Amalia brother siblings
Amalia has as many brothers as sisters. Her brother Ivan has 3 sisters. How many children are there in their family?
Red candles
For Christmas, the Veselá family made gel candles. Father Veselý filled the entire jar with green gel. Mother Veselá filled one-sixth of the jar with green gel and the rest with red. The daughter used the same amount of green and red gel, and the son pour

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