Multi-Step Decimal Operations

Andy went to the store and bought 3 bags of chips for $3.25 each and 2 cases of soda for $2.20 each. How much did he spend in total?

What is the "hidden question" or first step you will need to do to solve this problem?

• First add the price of a bag of chips and 2 cases of soda.

• Find out the total price for 2 cases of soda as well as the total price of 3 bags of chips. Then add those amounts together.

Andy went to the store and bought 3 bags of chips for $3.25 each and 2 cases of soda for $2.20 each. How much did he spend in total? 
Which of the following is the best way to estimate an answer to this problem?

• 3+3+2+2= 10
• (3x3)+(2x2)= 13
• 3x3x2x2= 36
• (3+3) x (2+2) = 24

Andy went to the store and bought 3 bags of chips for $3.25 each and 2 cases of soda for $2.20 each. How much did he spend in total? 
Which of the following is NOT a needed math operation to solve this problem?

• Multiply 3 and 3.25
• Multiply 2 and 2.20
• Add 3 and 2.20
• Add the total for the chips and the total for the soda

Andy went to the store and bought 3 bags of chips for $3.25 each and 2 cases of soda for $2.20 each. How much did he spend in total? 
Solve the problem, showing your work in your workbook.

• $10.45
• $14.15
• $5.45
• $10.90

Luis wants to earn $50 to buy his mom a gift. He earned $12.75 mowing lawns, $9.50 cleaning cars, and $11.80 walking dogs. How much more money does Luis have to reach his goal?

What is the "hidden question" or first step you will need to do to solve this problem?

• How many yards has he mowed?

• When does he walk the dogs?

• How much total money has he already earned?

Luis wants to earn $50 to buy his mom a gift. He earned $12.75 mowing lawns, $9.50 cleaning cars, and $11.80 walking dogs. How much more money does Luis have to reach his goal? 
Which of the following is the best way to estimate an answer to this problem?

• 50+13+10+12= 85
• 13+10+12 = 35
• 50 - (13+10+12) = 15
• 50- (12+9+11)= 18

Luis wants to earn $50 to buy his mom a gift. He earned $12.75 mowing lawns, $9.50 cleaning cars, and $11.80 walking dogs. How much more money does Luis have to reach his goal? 
Which of the following is NOT a needed math operation to solve this problem?

• Add up all of the money he made.
• Subtract the total money he made from $50
• Add 50+ 12.75+9.50+11.80
• Find the difference between what he wants to buy and how much he has earned.

Luis wants to earn $50 to buy his mom a gift. He earned $12.75 mowing lawns, $9.50 cleaning cars, and $11.80 walking dogs. How much more money does Luis have to reach his goal? 
Solve the problem, showing your work in your workbook.

• $84.05
• $34.05
• $16.95
• $15.95

Reggie went to the store. He bought three bags of dog treats for $1.57 each, kitty litter for $2.75, and four bags of hamster food for $1.38 each. How much money did Reggie give the cashier?

What is the "hidden question" or first step you will need to do to solve this problem?

• You just need to add all of the decimal numbers together.

• You need to find out how much it costs for 3 bags of dog food. Then you need to find out the cost of 4 bags of hamster food. Finally add these costs to the cost of the kitty litter.

Reggie went to the store. He bought three bags of dog treats for $1.57 each, kitty litter for $2.75, and four bags of hamster food for $1.38 each. How much money did Reggie give the cashier?
Which of the following is the best way to estimate an answer to this problem?

• 2+3+1= 6
• 3+1+4= 8
• (3x2)+3+(4x1)= 13
• 2X3X1= 6