Solving the MysterySolving the Mystery

Finding key words Finding key words to help pick the to help pick the right strategyright strategy

““SmartSmart””My dad gave me one dollar bill‘Cause I’m his smartest son,And I swapped it for two shiny quarters‘Cause two is more than one!

And then I took the quartersAnd traded them to LouFor three dimes – I guess he don’t knowThat three is more than two!

Just then, along came old blind BatesAnd just ‘cause he can’t see He gave me four nickels for my three dimes, And four is more than three!

““SmartSmart””

And I took the nickels to Hiram CoombsDown at the seed-feed store,And the fool gave me five pennies for them,And five is more than four!

And then I went and showed my dad,And he got red in the cheeksAnd closed his eyes and shook his head – Too proud of me to speak!

Our ObjectiveOur Objective To decide, with money To decide, with money

problems, how to pick the right problems, how to pick the right strategy to solve the problems. strategy to solve the problems.

Finding key words that tell us Finding key words that tell us what strategy to use. what strategy to use.

How do I figure out which words How do I figure out which words help?help?

Terry went shopping for some gifts. She spent $5.60 on a bicycle and $4.30 on a scooter, how much money did she spend in all?

Problem Key Words

Strategy(Add or

Subtract)

Work Solution

A)

A.Terry went shopping for some gifts. She spent $5.60 on a bicycle and $4.30 on a scooter, how much money did she spend in all?

Problem Key Words

Strategy(Add or

Subtract)

Work Solution

A) SpentSpentIn AllIn All

A.Terry went shopping for some gifts. She spent $5.60 on a bicycle and $4.30 on a scooter, how much money did she spend in all?

Problem Key Words

Strategy(Add or

Subtract)

Work Solution

A) SpentSpentIn AllIn All

AddAdd

A.Terry went shopping for some gifts. She spent $5.60 on a bicycle and $4.30 on a scooter, how much money did she spend in all?

Problem Key Words

Strategy(Add or

Subtract)

Work Solution

A) SpentSpentIn AllIn All

AddAdd $5.60$5.60 + 4.30+ 4.30 $9.90$9.90

A.Terry went shopping for some gifts. She spent $5.60 on a bicycle and $4.30 on a scooter, how much money did she spend in all?

Problem Key Words

Strategy(Add or

Subtract)

Work Solution

A) SpentSpentIn AllIn All

AddAdd $5.60$5.60 + 4.30+ 4.30 $9.90$9.90

She spent She spent $9.90.$9.90.

A.Terry went shopping for some gifts. She spent $5.60 on a bicycle and $4.30 on a scooter, how much money did she spend in all?

B) Jack buys a book about the Redwood National Park for $2.39. He pays with a 5-dollar bill. How much change does Jack receive?

Problem Key Words Strategy(addition or

subtraction)

Work Solution

B)

B) Jack buys a book about the Redwood National Park for $2.39. He pays with a 5-dollar bill. How much change does Jack receive?

Problem Key Words Strategy(addition or

subtraction)

Work Solution

B) ChangeReceive

B) Jack buys a book about the Redwood National Park for $2.39. He pays with a 5-dollar bill. How much change does Jack receive?

Problem Key Words Strategy(addition or

subtraction)

Work Solution

B) ChangeReceive

Subtract

B) Jack buys a book about the Redwood National Park for $2.39. He pays with a 5-dollar bill. How much change does Jack receive?

Problem Key Words Strategy(addition or

subtraction)

Work Solution

B) ChangeReceive

Subtract $ 5.00- 2.39 $2.61

B) Jack buys a book about the Redwood National Park for $2.39. He pays with a 5-dollar bill. How much change does Jack receive?

Problem Key Words Strategy(addition or

subtraction)

Work Solution

B)

ChangeReceive

Subtract $ 5.00- 2.39 $2.61

He received $2.61 in change.

1) John wants to buy some gifts for Christmas. His mother gave him $25.00 to purchase some gifts. Michael buys a game for $10.50 and a watch for $7.50. How much money does John have left?

Problem Key

WordsStrategy(Addition or Subtraction)

Work Solution

1)

1) John wants to buy some gifts for Christmas. His mother gave him $25.00 to purchase some gifts. Michael buys a game for $10.50 and a watch for $7.50. How much money does John have left?

Problem Key

WordsStrategy(Addition or Subtraction)

Work Solution

1)

BuysHave left

1) John wants to buy some gifts for Christmas. His mother gave him $25.00 to purchase some gifts. Michael buys a game for $10.50 and a watch for $7.50. How much money does John have left?

Problem Key

WordsStrategy(Addition or Subtraction)

Work Solution

1)

BuysHave left

Add, then subtract

1) John wants to buy some gifts for Christmas. His mother gave him $25.00 to purchase some gifts. Michael buys a game for $10.50 and a watch for $7.50. How much money does John have left?

Problem Key

WordsStrategy(Addition or Subtraction)

Work Solution

1)

BuysHave left

Add, then subtract

$10.50+ 7.50$18.00 $25.00 - 18.00 $ 7.00

1) John wants to buy some gifts for Christmas. His mother gave him $25.00 to purchase some gifts. Michael buys a game for $10.50 and a watch for $7.50. How much money does John have left?

Problem Key

WordsStrategy(Addition or Subtraction)

Work Solution

1)

BuysHave left

Add, then subtract

$10.50+ 7.50$18.00 $25.00 - 18.00 $ 7.00

He has $7.00 left.