📘 arithmetic

1. The problem is to divide 7.6 by 100 and understand how to do it. 2. Dividing a number by 100 means moving the decimal point two places to the left because 100 has two zeros.

1. We are asked to find the sum of 1 and 7. 2. Addition is the process of combining two numbers to get their total.

1. Let's start by understanding the problem: we want to find out what 22 plus 22 equals. 2. Think of 22 as a group of 22 things, like 22 apples.

1. We are asked to subtract the mixed numbers $5\,\frac{5}{6}$ and $2\,\frac{3}{8}$.\n 2. Convert both mixed numbers to improper fractions for easier subtraction.\n

1. **Stating the problem:** Simplify the expression $2 \frac{5}{6} - \frac{1}{10}$. 2. **Convert the mixed number to an improper fraction:**

1. We are asked to find the value of $2 \frac{1}{4} - \frac{1}{6}$.\n2. Convert the mixed number $2 \frac{1}{4}$ to an improper fraction. Since $2 = \frac{8}{4}$, we have $2 \frac{

1. **State the problem:** We want to find the difference between $1 \frac{1}{4}$ and $\frac{1}{5}$. 2. **Convert mixed number to improper fraction:**

1. **Stating the problem:** We need to find the sum of $5 + 6$. 2. **Performing the addition:** Adding the two numbers, we have

1. We are given the expression $5+1-2$. 2. We evaluate the addition first: $5+1=6$.

1. **Stating the problem:** We want to learn how to add a one-digit number to a two-digit number. 2. **Example:** Suppose we add $7$ (one-digit) to $34$ (two-digit).

1. **State the problem:** We need to estimate the values of two expressions by rounding each number to 1 significant figure and then performing the calculations. 2. **Part (a):** C

1. The problem is to find the result of multiplying 39.3 by 2.1 and then subtracting 18.5. 2. First, multiply 39.3 by 2.1:

1. Problem (6): Calculate the mass of 30 bags each weighing 15 kg. To find the total mass, multiply the number of bags by the mass of one bag:

1. Calculate the product of 48 and 50. The product of two numbers is found by multiplying them.

1. The problem is to multiply each decimal number by the whole number below it. 2. Multiply $13.56 \times 24$:

1. We are given the expression $5137 \times 65$, and we need to calculate its value. 2. Multiply the two numbers directly:

1. The problem is to multiply two numbers: 4109 and 92. 2. We'll perform the multiplication step-by-step.

1. The problem is to multiply the given pairs of numbers: (12) 235 \times 724, (14) 1703 \times 53, (13) 1386 \times 35, (11) 760 \times 57.

1. The problem asks to multiply each pair of numbers vertically given in the exercises. 2. Calculate each multiplication step-by-step:

1. The problem is to subtract two numbers: $93.1$ and $6 - 2.8$. 2. First, simplify the expression inside the subtraction: $6 - 2.8 = 3.2$.

1. The problem states: "0.2 less than 2800." We need to find the value that is 0.2 less than 2800. 2. To express "0.2 less than 2800," we write the subtraction: