📘 arithmetic

1. The problem is to multiply 90 by 90. 2. Multiplication means adding a number to itself a certain number of times. Here, we add 90 to itself 90 times.

1. **State the problem:** We need to find the sum of 76 and 67. 2. **Add the numbers:**

1. The problem is to find the sum of 23 and 4. 2. We add the two numbers: $$23 + 4 = 27$$

1. The problem is to find the value of $24 - 24$. 2. Subtraction means taking away the second number from the first number.

1. The problem is to understand the number 123 as a mathematical object or value. 2. The number 123 is a positive integer.

1. The problem is to multiply 79 by 79. 2. We can write this as $79 \times 79$.

1. The problem is to find the value of 26. 2. Since 26 is a constant number, it is already simplified and does not require any further calculation.

1. **State the problem:** Simplify the expression $3 \frac{1}{4} - \left(5 \frac{1}{2} + 2 \frac{2}{3}\right)$.\n\n2. **Convert mixed numbers to improper fractions:**\n$3 \frac{1}{

1. The problem is to evaluate the expression $3 \frac{1}{4} - \left(5 \frac{1}{5} + 2 \frac{2}{3}\right)$.\n\n2. Convert the mixed numbers to improper fractions:\n$3 \frac{1}{4} =

1. **State the problem:** We need to determine which people are tall enough to ride the roller coaster. The minimum height required is $1 \frac{2}{3}$ meters. 2. **Convert mixed nu

1. The problem asks: In the multiplication table of 2, at which position does the number 32 appear? 2. The multiplication table of 2 is formed by multiplying 2 by natural numbers:

1. The problem asks to square the number 267. 2. Squaring a number means multiplying the number by itself: $$267^2 = 267 \times 267$$.

1. The problem involves comparing two amounts: 2000 and 2545.10. 2. Since these are plain numbers, we can analyze the difference by subtracting the smaller from the larger.

1. The problem is to multiply 0.0044 by 1000. 2. Multiplying by 1000 means shifting the decimal point three places to the right.

1. The problem is to divide 0.0044 by 0.0404. 2. Write the division as a fraction: $$\frac{0.0044}{0.0404}$$.

1. The problem is to add the two decimal numbers: $0.004$ and $0.0004$. 2. Align the numbers by their decimal points:

1. The problem is to add two numbers that have the same digits. 2. When digits are the same, adding them is straightforward: you add each digit in the same place.

1. The problem is to solve the division $0.004 \div 0.0004$. 2. To simplify, rewrite the division as a fraction: $$\frac{0.004}{0.0004}$$.

1. The problem is to evaluate the expression: 8 divided by 2 and 4/5. 2. First, interpret "2 and 4/5" as the mixed number $2 \frac{4}{5}$.

1. **Tom's baseball cards problem:** Tom had 114 baseball cards and kept 10. So, the number of cards he shared is $$114 - 10 = 104$$. He shared these 104 cards evenly among 8 frien

1. The problem asks to divide 3 by 2 and a half. 2. First, convert 2 and a half to an improper fraction: 2 and a half = 2 + \frac{1}{2} = \frac{4}{2} + \frac{1}{2} = \frac{5}{2}.