The procedure used to solve a problem is called Problem Solving.
Some of the problems solving strategies are: drawing a diagram, looking for the pattern, guess and check, trial and error, working forward and backward, etc.
Suppose Elisa collected 5 stamps on Monday, 10 stamps on Tuesday, and 15 stamps on Wednesday. If she continues the pattern, then, by Friday, she will be having 25 stamps, because the rule for the given pattern is 'multiples of 5' i.e. 5, 10, 15, 20, 25,...
A. 40 - 10 = 30; 5 - 2 = 3; 30 + 3 = 33
B. 40 + 10 = 50; 5 + 2 = 7; 50 + 7 = 57
C. 40 - 10 = 30; 5 - 2 = 3; 30 - 3 = 27
D. 40 - 10 = 30; 5 - 1 = 4; 30 + 4 = 34
Correct Answer: A
Step 1: Number of questions Stephen marked correct = 45 - 12
Step 2: 45 = 4 tens + 5 ones; and 12 = 1 ten + 2 ones
Step 3: 45 - 12 = (4 tens + 5 ones) - (1 ten + 2 ones) = (4 tens - 1 ten) + (5 ones - 2 ones)
Step 4: = (40 - 10) + (5 - 2) = 30 + 3 = 33
Step 5: So, the strategy '40 - 10 = 30; 5 - 2 = 3; 30 + 3 = 33' would help to solve the problem.
Q1: Stephen had 45 questions on a test and got 12 wrong. How many did he get right?
Q2: Elisa collects stamps. She collected 5 stamps on Monday, 10 on Tuesday, and 15 on Wednesday. Following this pattern, how many will she have by Friday?
Q: What are some basic problem-solving strategies?
A: Drawing diagrams, looking for patterns, guess and check, and working backward are a few examples.
Q: Why is problem-solving important?
A: It helps develop critical thinking skills and allows us to overcome obstacles in various aspects of life.