2.21
Use addition and subtraction within 100 to solve word problems involving same units of length, representing the problem with drawings (such as drawings of rulers) and/or equations with a symbol for the unknown number.
Example Problems
Bernice is planning to build new storage sheds.
Each shed requires 12 wooden beams, and each shed can hold 200 boxes.
She receives a shipment of 2 wooden beams each day.
Shipments can continue for 60 days before they become too expensive.
Bernice wants enough sheds to store at least 1,000 boxes in total.
How many sheds can Bernice build with the maximum number of beams delivered?
Each shed requires 12 wooden beams, and each shed can hold 200 boxes.
She receives a shipment of 2 wooden beams each day.
Shipments can continue for 60 days before they become too expensive.
Bernice wants enough sheds to store at least 1,000 boxes in total.
How many sheds can Bernice build with the maximum number of beams delivered?
Landon's family of 7 people lives in a large house with 4 bathrooms.
In the past month, each person took showers totaling 600 minutes and used an average of 90 liters of shower water.
The cost of water is 0.22 dollars per liter.
How much did Landon's family spend, in total, on shower water last month?
In the past month, each person took showers totaling 600 minutes and used an average of 90 liters of shower water.
The cost of water is 0.22 dollars per liter.
How much did Landon's family spend, in total, on shower water last month?
Shannon's household has 3 people (including Shannon) and 2 bathrooms.
Last month, each person showered for an average of 450 minutes total and used an average of 60 liters of shower water.
Water costs 0.18 dollars per liter.
How much money did Shannon's household spend, in total, on shower water last month?
Last month, each person showered for an average of 450 minutes total and used an average of 60 liters of shower water.
Water costs 0.18 dollars per liter.
How much money did Shannon's household spend, in total, on shower water last month?
Khan Academy ResourcesSolve problems with picture graphsAdd and subtract on the number line word problemsSubtraction word problems within 1002-step subtraction word problems within 100Find the missing number (add and subtract within 100)Adding up to four 2-digit numbers word problemsLength word problemsSolve problems with line plotsAdding up to four 2-digit numbers2-step addition word problems within 100Solve problems with bar graphsLength word problem (US customary)Addition word problems within 100Adding and subtracting on number line word problemsSubtraction word problem: basketballAdding multiple 2-digit numbers word problemsAdding two digit numbers on a number linePicture graphsAddition word problem: horsesLength word problemsMulti-step subtraction word problemAdding four two digit numbersMulti step addition word problemSubtraction word problem: crayonsLength word problem example (US Customary)
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