📘 arithmetic

1. The problem is to divide 0.72 by 0.00044. 2. The formula for division is $$\frac{a}{b}$$ where $a$ is the numerator and $b$ is the denominator.

1. The problem is to divide a two-digit number by a one-digit number. 2. The formula for division is $$\text{Dividend} \div \text{Divisor} = \text{Quotient}$$ where the dividend is

1. Let's start by understanding what a sum is. A sum is the result of adding two or more numbers together. 2. For example, if you have the numbers 3 and 5, their sum is calculated

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

1. **State the problem:** Calculate the product of 2 and 10. 2. **Formula used:** Multiplication of two numbers is given by $a \times b$.

1. Problem 12: The cost of 17 chairs is 9605. Find the number of chairs that can be purchased for 56500. Using the unitary method:

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

**Step 1:** Imagine you have <span style='font-size: 2em;'>🍎 🍎 🍎 🍎 🍎 🍎 🍎 🍎 🍎 🍎</span> (10 apples) and then add more apples.<br> **Step 2:** Now add <span style='font-size: 2em;'>🍎

Let's solve this step by step! 🎉 **Step 1:** Imagine you have 1 bird. <br><span style='font-size: 2em;'>🐦</span><br>(1 bird)

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

1. **State the problem:** Calculate the sum of 20 and 2. 2. **Formula used:** Addition of two numbers is given by $a + b$.

1. The problem is to find the sum of 90 and 6. 2. The formula for addition is $a + b = c$, where $a$ and $b$ are the numbers to add, and $c$ is the result.

1. The problem is to find the sum of 55 and 5. 2. The formula for addition is $a + b = c$, where $a$ and $b$ are numbers and $c$ is their sum.

1. The problem is to find the sum of 15 and 5. 2. The formula for addition is $a + b = c$, where $a$ and $b$ are numbers and $c$ is their sum.

1. Calculate $6.8 \times 3 = 20.4$. 2. Calculate $15 \times 0.7 = 10.5$.

1. The problem is to multiply the numbers given and write the answer as a whole number when possible. 2. For the first multiplication: $6 \times 7$

1. **State the problem:** Add the three decimal numbers: $5.78$, $3.57$, and $6.6$. 2. **Recall the addition rule for decimals:** Align the decimal points and add digits column by

1. **State the problem:** Add the three decimal numbers: $5.78$, $3.57$, and $6.6$. 2. **Formula used:** To add decimals, align the decimal points and add digit by digit from right

1. The problem is to understand the number 10.5. 2. 10.5 is a decimal number, which means it has a whole number part and a fractional part separated by a decimal point.

1. The problem is to find the sum of 5 and 5555. 2. The formula for addition is simply $a + b = c$, where $a$ and $b$ are the numbers to add, and $c$ is the result.

1. **State the problem:** Divide 5712 by 7. 2. **Formula used:** Division is the process of finding how many times one number is contained within another. Here, we want to find $\f