📘 arithmetic

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

1. The problem is to find the total sum of all the amounts listed. 2. Each amount is given in numbers, mostly 10,000, with some values like 15,000, 20,000, 30,000, 50,000.

1. The problem is to divide 90 by 9. 2. The division formula is $\frac{a}{b} = c$, where $a$ is the dividend, $b$ is the divisor, and $c$ is the quotient.

1. Problem: Calculate $\frac{24}{6}$.\n Formula: Division is splitting a number into equal parts.\n Work: $24 \div 6 = 4$.\n Explanation: 24 divided into 6 equal parts gives

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

1. Stating the problem: Calculate the value of the expression $790 \times 14 + 30\,300$. 2. Use the order of operations (PEMDAS/BODMAS): multiplication first, then addition.