📘 arithmetic

1. The problem is to add 126 and 7 by first rounding up and then subtracting. 2. First, round 126 up to the nearest ten. Since 126 is between 120 and 130, rounding up gives 130.

1. The problem is to multiply two decimal numbers and place the decimal point correctly in the product. 2. The rule for multiplying decimals is: multiply the numbers as if they wer

1. The problem is to multiply decimal numbers and place the decimal point correctly in the product. 2. The formula for multiplication of decimals is the same as for whole numbers,

1. The problem asks to round the number 4.8 to the nearest whole number. 2. The rule for rounding to the nearest whole number is: if the decimal part is 0.5 or greater, round up; i

1. **State the problem:** We need to find how many thirds are in the mixed number $6 \frac{1}{3}$. 2. **Convert the mixed number to an improper fraction:**

1. Write the given percentages as decimals. (a) 74% = $\frac{74}{100} = 0.74$

1. **Problem statement:** Estimate the answers for the following calculations and write the results with 3 significant figures. 2. **Estimation rules:** To estimate, round each num

1. The problem states that a chef poured 22 liters of water equally into 4 containers. 2. To find out how much water is in each container, we use the formula for equal distribution

1. **State the problem:** Multiply 740 by 27. 2. **Formula used:** Multiplication of two numbers $a$ and $b$ is $a \times b$.

1. **State the problem:** Multiply 740 by 72. 2. **Formula used:** Multiplication of two numbers is done by multiplying each digit and adding the results appropriately.

1. The problem is to multiply 486 by 60. 2. The formula for multiplication is $a \times b = c$, where $a$ and $b$ are the numbers to multiply, and $c$ is the product.

1. The problem is to express the fraction $\frac{1}{2}$ as a decimal. 2. To convert a fraction to a decimal, divide the numerator by the denominator.

1. **State the problem:** Calculate the result of the subtraction $5.921 - 13.2$. 2. **Recall the subtraction rule:** When subtracting a larger number from a smaller number, the re

1. **State the problem:** We need to divide 600.30 by 2570.20. 2. **Write the division expression:**

1. The problem states: The guitar price is 2240. 2. Since this is a straightforward statement of price without any additional operations or unknowns, no algebraic manipulation is n

1. **State the problem:** Calculate the value of the expression $6 \times 2 + 4$. 2. **Recall the order of operations:** According to the order of operations (PEMDAS/BODMAS), multi

1. The problem is to find the sum of 2 and 5000. 2. The formula for addition is simply $a + b = c$, where $a$ and $b$ are numbers and $c$ is their sum.

1. **State the problem:** We need to find the quotients of the division expressions: - $1248 \div 0.25$

1. The problem asks to solve the expression $1 \frac{1}{7} - \frac{3}{4}$.\n2. Convert the mixed number to an improper fraction: $1 \frac{1}{7} = \frac{8}{7}$.\n3. Find a common de

1. Masalah yang diberikan adalah menentukan total dan per porsi untuk quantity tertentu. 2. Untuk menyelesaikan masalah ini, kita gunakan rumus dasar pembagian: $$\text{Per porsi}

1. The first problem asks to convert the fraction $\frac{1}{100}$ to a decimal. 2. To convert a fraction to a decimal, divide the numerator by the denominator.