Problem-Solving Strategy: Look for a pattern

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Problem-Solving Strategy: Look for a pattern

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Presentation transcript:

Problem-Solving Strategy: Look for a pattern Lesson 2-3 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: 1hr

2-6 Problem-Solving Strategy: Look for a Pattern Solve Problems worked: 3 4 6 9 Time worked: 1hr 2hr

2-6 Problem-Solving Strategy: Look for a Pattern Solve Problems worked: 3 4 6 9 13 18 Time worked: 1hr 2hr 3hr

2-6 Problem-Solving Strategy: Look for a Pattern Solve Problems worked: 3 4 6 9 13 18 24 31 Time worked: 1hr 2hr 3hr 4hr

2-6 Problem-Solving Strategy: Look for a Pattern Solve Problems worked: 3 4 6 9 13 18 24 31 Time worked: 1hr 2hr 3hr 4hr 3 + 4 + 6 + 9 + 13 + 18 + 24 + 31 =

2-6 Problem-Solving Strategy: Look for a Pattern Solve Problems worked: 3 4 6 9 13 18 24 31 Time worked: 1hr 2hr 3hr 4hr 3 + 4 + 6 + 9 + 13 + 18 + 24 + 31 = 108 problems

2-6 Problem-Solving Strategy: Look for a Pattern Solve Problems worked: 3 4 6 9 13 18 24 31 Time worked: 1hr 2hr 3hr 4hr 3 + 4 + 6 + 9 + 13 + 18 + 24 + 31 = 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 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, . . .

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