# Problem-Solving Strategy: Look for a pattern

## Presentation on theme: "Problem-Solving Strategy: Look for a pattern"— Presentation transcript:

Problem-Solving Strategy: Look for a pattern
Objective: Solve problems by looking for a pattern.

2-6 Problem-Solving Strategy: Look for a Pattern
Example Sara was trying to finish all her math homework on Friday. She did 3 problems the first 30 minutes, 4 problems the next 30 minutes, 6 problems the next 30 minutes, 9 problems the next 30 minutes, and so forth. If she continues to work at this rate, how many problems will she have done in 4 hours.

2-6 Problem-Solving Strategy: Look for a Pattern
Example Sara was trying to finish all her math homework on Friday. She did 3 problems the first 30 minutes, 4 problems the next 30 minutes, 6 problems the next 30 minutes, 9 problems the next 30 minutes, and so forth. If she continues to work at this rate, how many problems will she have done in 4 hours. Explore Sara worked 30 min per problem set. Time worked number of problems worked 1st 30 min 3 2nd 30 min 4 3rd 30 min 6 4th 30 min 9

2-6 Problem-Solving Strategy: Look for a Pattern
Example Sara was trying to finish all her math homework on Friday. She did 3 problems the first 30 minutes, 4 problems the next 30 minutes, 6 problems the next 30 minutes, 9 problems the next 30 minutes, and so forth. If she continues to work at this rate, how many problems will she have done in 4 hours. Explore Sara worked 30 min per problem set. Time worked number of problems worked 1st 30 min 3 2nd 30 min 4 3rd 30 min 6 4th 30 min 9 Plan Look for a pattern.

2-6 Problem-Solving Strategy: Look for a Pattern
Example Sara was trying to finish all her math homework on Friday. She did 3 problems the first 30 minutes, 4 problems the next 30 minutes, 6 problems the next 30 minutes, 9 problems the next 30 minutes, and so forth. If she continues to work at this rate, how many problems will she have done in 4 hours. Explore Sara worked 30 min per problem set. Time worked number of problems worked 1st 30 min 3 2nd 30 min 4 increased by 1 3rd 30 min 6 4th 30 min 9 Plan Look for a pattern.

2-6 Problem-Solving Strategy: Look for a Pattern
Example Sara was trying to finish all her math homework on Friday. She did 3 problems the first 30 minutes, 4 problems the next 30 minutes, 6 problems the next 30 minutes, 9 problems the next 30 minutes, and so forth. If she continues to work at this rate, how many problems will she have done in 4 hours. Explore Sara worked 30 min per problem set. Time worked number of problems worked 1st 30 min 3 2nd 30 min 4 increased by 1 3rd 30 min 6 increased by 2 4th 30 min 9 Plan Look for a pattern.

2-6 Problem-Solving Strategy: Look for a Pattern
Example Sara was trying to finish all her math homework on Friday. She did 3 problems the first 30 minutes, 4 problems the next 30 minutes, 6 problems the next 30 minutes, 9 problems the next 30 minutes, and so forth. If she continues to work at this rate, how many problems will she have done in 4 hours. Explore Sara worked 30 min per problem set. Time worked number of problems worked 1st 30 min 3 2nd 30 min 4 increased by 1 3rd 30 min 6 increased by 2 4th 30 min 9 increased by 3 Plan Look for a pattern.

2-6 Problem-Solving Strategy: Look for a Pattern
Example Sara was trying to finish all her math homework on Friday. She did 3 problems the first 30 minutes, 4 problems the next 30 minutes, 6 problems the next 30 minutes, 9 problems the next 30 minutes, and so forth. If she continues to work at this rate, how many problems will she have done in 4 hours. Explore Sara worked 30 min per problem set. Time worked number of problems worked 1st 30 min 3 2nd 30 min 4 increased by 1 3rd 30 min 6 increased by 2 4th 30 min 9 increased by 3 Plan Look for a pattern. The difference between numbers increases by 1 each time.

2-6 Problem-Solving Strategy: Look for a Pattern
Solve Problems worked: 3 4 Time worked: hr

2-6 Problem-Solving Strategy: Look for a Pattern
Solve Problems worked: Time worked: hr 2hr

2-6 Problem-Solving Strategy: Look for a Pattern
Solve Problems worked: Time worked: hr 2hr hr

2-6 Problem-Solving Strategy: Look for a Pattern
Solve Problems worked: Time worked: hr 2hr hr hr

2-6 Problem-Solving Strategy: Look for a Pattern
Solve Problems worked: Time worked: hr 2hr hr hr =

2-6 Problem-Solving Strategy: Look for a Pattern
Solve Problems worked: Time worked: hr 2hr hr hr = 108 problems

2-6 Problem-Solving Strategy: Look for a Pattern
Solve Problems worked: Time worked: hr 2hr hr hr = 108 problems Examine Do the number of problems worked each half hour follow the pattern?

2-6 Problem-Solving Strategy: Look for a Pattern
Write a rule to find the successive terms in the pattern. 63, 48, 35, 24,

2-6 Problem-Solving Strategy: Look for a Pattern
Write a rule to find the successive terms in the pattern. 63, 48, 35, 24, The number decreased by 15, then 13, then 11, so the next number should decrease by 9 and then by 7. The number subtracted decreases by two each time.

2-6 Problem-Solving Strategy: Look for a Pattern
The pattern of numbers, 1, 1, 2, 3, 5, 8, , is called the Fibonacci sequence. The terms of the sequence are called the Fibonacci numbers. List the first ten Fibonacci numbers.

2-6 Problem-Solving Strategy: Look for a Pattern
The pattern of numbers, 1, 1, 2, 3, 5, 8, , is called the Fibonacci sequence. The terms of the sequence are called the Fibonacci numbers. List the first ten Fibonacci numbers. 1, 1, 2, 3, 5, 8, 13, 21, 34, 55

2-6 Problem-Solving Strategy: Look for a Pattern
Find a pattern for the following numbers. 1, 3, 5, 8, 11, 15, 19,

2-6 Problem-Solving Strategy: Look for a Pattern
Find a pattern for the following numbers. 1, 3, 5, 8, 11, 15, 19, Pattern: +2, +2, +3, +3, +4, +4, +5, +5, . . .

2-6 Problem-Solving Strategy: Look for a Pattern
Find the number that should be in the blank space. 1, 24, 2, 23, 3, 22, 4, , 13, 13, __ 12

2-6 Problem-Solving Strategy: Look for a Pattern
Find the number that should be in the blank spaces. 1, 4, 10, 20, 35, 56, __, __, __

2-6 Problem-Solving Strategy: Look for a Pattern
Find the number that should be in the blank spaces. 1, 4, 10, 20, 35, 56, __, __, __ 84, 120