Number sense and counting (T1 W1)
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Number sense refers to a person's ability to understand, interpret, and work with numbers. It includes skills such as counting, comparing quantities, and recognizing patterns. Developing a strong number sense helps students make sense of mathematical concepts and solve problems more effectively. In this lesson, we will explore different ways to count and represent numbers visually.
Let's take the number 15. We can represent this number using different visual models. For example, we can use ten frames, where we fill one full ten frame and add five more counters to represent 15. Another way is to use a number line, where we can start at 0 and count up to 15. This visual representation helps us understand the quantity of 15 better and see how it relates to other numbers.
Now, let's practice counting together. I will show you a set of objects, and I want you to count them aloud. For example, if I have 8 apples, how many more do I need to make a group of 10? (Students will respond with 2.) Next, let’s compare two numbers: 12 and 15. Which number is greater? (Students will respond with 15.) This practice helps reinforce our understanding of numbers and their relationships.
For your independent practice, solve the following problems: 1) If you have 20 marbles and give away 7, how many do you have left? 2) Count the number of stars in the picture and write the total. 3) Create a number line from 0 to 20 and mark the numbers 5, 10, and 15. Show your working clearly for each problem. Remember to check your answers and correct any mistakes you find.
Answer: 2
In the number 23, the digit in the tens place is 2, which represents 20.
Answer: 24
24 is greater than 18 because it has a higher value.
Answer: 10
15 - 5 equals 10, so you have 10 candies left.
Answer: 5
The number 56 has 5 tens (50) and 6 ones.
Answer: 30
The number that comes after 29 is 30.
Answer: Number line
A number line is a visual model that helps represent numbers and their relationships.
Answer: 15
10 + 5 equals 15, so you have 15 apples in total.
Answer: 15
The sum of 7 and 8 is 15.