Today, we will learn how to estimate, add, and subtract numbers. These skills help us solve math problems quickly and correctly, especially in real-life situations like using money.
First, let us talk about estimating the difference of two numbers. Estimating means finding an answer that is close to the exact answer. We do this by rounding numbers to the nearest tens, hundreds, or thousands. For example, to estimate the difference of 4,823 and 2,176, we round them to 4,800 and 2,200. Then we subtract to get an estimated answer. Estimating helps us check if our final answer makes sense.
Next, we learn how to add and subtract 3 to 4 numbers with up to 2 digits. When we solve these, we must follow the correct order of operations. This means we solve the numbers from left to right, making sure to add or subtract carefully and accurately.
Finally, we apply these skills in word problems, especially problems involving money. For example, we may add the prices of items or subtract the amount spent from the total money. We read the problem carefully, decide whether to add or subtract, and then solve step by step.
By learning to estimate, add, subtract, and solve problems correctly, we become more confident in math and better at using numbers in everyday life.
