Model It 100
Draw or describe a place-value model to add $1.25 + $0.30. What is the sum?
$1.55
A customer pays $10.00 for an item that costs $7.25. How much change should they receive?
$2.75
Use a standard algorithm to compute 2.35 + 1.40. Show the final answer.
$3.75
Jenna had $5.00. She bought a snack for $1.25. How much money does she have left?
$3.75
Choose any strategy to solve the equation 0.75 + 0.25 quickly? Solve it.
1.00
Use a model to subtract $4.50 − $1.75. Show intermediate steps from the model and give the difference.
$2.75
You buy two items priced $3.45 and $4.80. If you pay with a $10.00 bill, what is your change?
$1.75
Use the standard algorithm to compute 6.80 − 2.45. Show the final answer
$4.35
A toy costs $8.75 and a book costs $6.40. How much will both cost together?
$15.15
A student used a model to find 5.40 − 2.15 but forgot to line up hundredths. What mistake might that cause? Correct it and compute the right answer.
Misaligned hundredths can give wrong tenths/hundredths—correct answer: $3.25
Model the sum $3.67 + $2.48. Explain any regrouping in the model and state the answer.
$6.15
An item costs $12.99. You give the cashier $20.00. How much change should you get?
$7.01
Compute 14.57 + 3.68 using the algorithm. Show regrouping and the answer.
$18.25
Maria deposited $10.50 then withdrew $3.75. What is her balance change?
$6.75
Compute 4.95 + 0.07. Show both a quick mental/money strategy and the standard algorithm.
$5.02
Use a model to compute $7.00 − $3.58. Show how you represent hundredths and explain borrowing if needed.
$3.42
Two friends split a $15.75 pizza evenly. How much does each person pay?
7.87
Compute 20.00 − 7.34 using the standard algorithm. Show all borrowing steps and the result.
$12.66
A class raised $45.60. They spent $12.35 on supplies and $8.90 on snacks. How much remains? Show subtraction to the hundredths.
$24.35
Compare solving 9.99 − 0.01 using a model versus using the algorithm. Which is faster and why? Show the result.
Both give 9.98
Draw a model that shows how to add $12.36 + $9.89. Explain how the model helps with the hundredths place and provide the total.
$22.25
A shopper buys three items: $2.49, $5.75, and $3.26. They pay with a $20 bill. What change should they receive?
$8.50
Use the standard algorithm to add 18.79 + 6.58 + 0.63. Show work and the final sum.
$26
A family budget: Rent $750.00, groceries $142.67, utilities $58.49, transportation $36.85. If their monthly income is $1,000.00, how much is left after these expenses? (Use decimals to the hundredths and show work with a strategy you choose.)
$11
A cashier quickly adds these prices: $3.49, $2.36, $4.15, $0.99. Show the sum using a combination of mental (money) strategies and the standard algorithm; explain why you switched methods.
$11