Problem solving and revision (T2 W8)
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Problem solving is a crucial skill in mathematics that helps us apply what we know to find solutions. In this lesson, we will explore various strategies such as drawing diagrams, using number lines, and breaking down problems into smaller parts. By using these methods, we can visualize the problem and make it easier to solve.
Let's solve the problem: 'Sarah has 12 apples, and she buys 8 more. How many apples does she have now?' First, we can represent this with a simple equation: 12 + 8. By calculating, we find that Sarah has 20 apples. We can also draw a number line to visualize the addition, starting at 12 and moving 8 spaces forward to reach 20.
Now, let's work together on this problem: 'Tom has 30 candies, and he wants to share them equally with 5 friends. How many candies will each friend get?' We can start by dividing 30 by 5. Let's write it out: 30 Γ· 5 = ? Each friend will receive 6 candies. Remember to show your working by writing down the division process.
Now it's your turn! Solve the following problems on your own. Remember to show your working clearly. 1. If a book costs R45 and you buy 3 books, how much do you spend in total? 2. A farmer has 50 chickens and sells 20. How many chickens does he have left? 3. If you read 15 pages of a book each day, how many pages will you read in a week? 4. There are 24 students in a class, and they are divided into groups of 4. How many groups are there?
Answer: 42
15 + 27 equals 42 when you add the two numbers together.
Answer: 35
50 - 15 equals 35, which is the number of marbles left.
Answer: 25
When you divide 100 by 4, you get 25.
Answer: R30
10 pencils at R3 each cost R30 in total.
Answer: 54
9 multiplied by 6 equals 54.
Answer: 3
A triangle has 3 sides.
Answer: 8
12 - 4 equals 8 cookies remaining.
Answer: 16 cm
Perimeter = 2(length + width) = 2(5 + 3) = 16 cm.