📘 arithmetic

1. The problem is to understand the number 9. 2. Number 9 is a single-digit integer and is the square of 3 since $9 = 3^2$.

1. The problem is to solve the expression $1 - 12$. 2. The formula used here is simple subtraction: $a - b = c$ where $a=1$ and $b=12$.

1. The problem is to add the pairs of numbers given vertically. 2. Addition is the process of combining two numbers to get their total or sum.

Let's play a fun snake game to count up to 20! 🐍🎉 **Step 1:** Imagine the snake starts with 5 apples 🍎 🍎 🍎 🍎 🍎.

**Step 1:** Imagine you have 1 big 🍎. <div style='border: 3px solid #FF6347; padding: 15px; border-radius: 10px; display: inline-block; background-color: #FFDAB9;'>

1. The problem is to understand the mixed number 15 1/2, which represents the number of days Gerry kept the book. 2. A mixed number consists of a whole number and a fraction. Here,

1. The problem is to calculate $1 - 1$. 2. The subtraction operation is defined as taking away the second number from the first.

**Step 1:** Imagine you have 1 big 🍎 <br> <span style='font-size: 2em;'>🍎</span> (1 apple)<br>

1. **State the problem:** Calculate the sum of 2 plus 2. 2. **Formula used:** Addition of two numbers is given by $a + b$.

1. **State the problem:** Add the two numbers given in columns: $$\begin{array}{ccc} & 5 & 6 & 3 \\ + & 2 & 1 & 8 & 5 \end{array}$$

1. **State the problem:** Add the numbers 17, 4842, and 6. 2. **Write the numbers clearly:**

1. **Stating the problem:** Calculate $210 \div 5$ using long division. 2. **Formula and rules:** Division is splitting a number into equal parts. Here, we divide 210 by 5.

1. The problem is to multiply the given two-digit numbers by one-digit numbers. 2. The multiplication formula is straightforward: multiply each digit of the two-digit number by the

1. The problem is to multiply two-digit numbers by one-digit numbers. 2. The multiplication rule is: multiply each digit of the two-digit number by the one-digit number, starting f

1. The problem is to calculate the sum of 309_264 and 678. 2. First, note that the underscore in 309_264 is likely a formatting separator and does not affect the number's value, so

1. **State the problem:** We have seven pins with point values 13, 57, 8, 39, 48, 24, and 47. We need to find which three pins add up to exactly 100 points.

1. **State the problem:** Divide 3 years and 4 months by 5. 2. **Convert all units to a single unit:**

1. **State the problem:** We need to divide a time duration of 6 weeks and 2 days by 4. 2. **Convert all units to a single unit:** Let's convert weeks and days into days only.

1. The problem is to find the sum of 10 and 20. 2. The formula for addition is $a + b = c$, where $a$ and $b$ are numbers and $c$ is their sum.

1. **Stating the problem:** Fatima claims that if she adds the fractions $\frac{1}{4}$ and $\frac{3}{4}$, she will get one whole. We need to verify if this is correct. 2. **Formula

1. **Problem Statement:** Divide 4850 by 10. 2. **Formula:** Division is the process of finding how many times the divisor fits into the dividend. The formula is: