📘 arithmetic

1. **Stating the problem:** We will explore factors and multiples, which are important concepts in math for class 4 students. 2. **Definition of factors:** A factor of a number is

1. **State the problem:** Calculate the result of subtracting 1170 from 1440. 2. **Formula used:** Subtraction of two numbers is given by $$a - b$$ where $a$ and $b$ are numbers.

1. **State the problem:** A truck starts with 98.502 pounds of sand and loses 28.293 pounds during the trip. We need to find how much sand remains when it arrives. 2. **Formula use

1. **State the problem:** Evelyn rode two trains, first for 137.13 miles and then for 51.1 miles. We need to find the total distance she rode. 2. **Formula used:** To find the tota

1. **State the problem:** A dump truck initially has 148.813 pounds of wood chips. It drops off 76.849 pounds at the playground. We need to find how many pounds of wood chips remai

1. **State the problem:** A chef bought 9.28 kilograms of almonds and 0.82 kilograms of pecans. We need to find the total kilograms of nuts bought. 2. **Formula used:** To find the

1. **State the problem:** A cheese maker starts with 644.7 ounces of cheddar cheese and sells 471.961 ounces. We need to find out how much cheese is left. 2. **Formula used:** To f

1. **State the problem:** We need to find how much more the green block weighs compared to the purple block. 2. **Identify the weights:** The green block weighs $0.11$ pounds and t

1. **State the problem:** Brody starts with 2.33 grams of pepper and uses 0.26 grams. We need to find how much pepper is left. 2. **Formula:** To find the remaining amount, subtrac

1. **State the problem:** Maya bought two watermelons weighing 2.036 pounds and 7.8 pounds respectively. We need to find the total weight of the watermelons. 2. **Formula used:** T

1. **State the problem:** Santiago wants to place his dresser and bed along the same wall. We need to find the total length of the wall required. 2. **Identify the given values:**

1. **State the problem:** A dairy farm produced 692.8 gallons of milk and used 338.9 gallons to make cheese. We need to find how much milk is left. 2. **Formula used:** To find the

1. **State the problem:** A chef bought 76.189 pounds of white rice and 93.818 pounds of brown rice. We need to find the total amount of rice bought. 2. **Formula used:** To find t

1. **State the problem:** A dump truck initially has 88.126 pounds of wood chips. It drops off 43.975 pounds at the playground. We need to find how many pounds of wood chips remain

1. The problem asks to identify a factor of 10. 2. A factor of a number is an integer that divides the number exactly without leaving a remainder.

1. The problem is to understand and work with the numbers: $\frac{1}{2}$, 2, 3, and 4. 2. These numbers include a fraction ($\frac{1}{2}$) and whole numbers (2, 3, 4).

1. 题目是计算表达式：$50 - 40 - 2$。 2. 计算时，减法是从左到右依次进行的。

1. **State the problem:** Calculate the sum of 4 and 5. 2. **Formula used:** Addition of two numbers is given by $a + b$.

1. **State the problem:** Calculate the sum of 65 and 92. 2. **Formula used:** Addition of two numbers is given by $a + b$.

1. 18 - 0.8 = 17.2 2. 8 - 0.07 = 7.93

1. **Problem:** Find the difference for $18 - 0.8$. 2. **Formula:** Subtraction of decimals from whole numbers is done by aligning decimal points and subtracting as usual.