standard_description: Fluently add and subtract within 20 using mental strategies. (See standard 1.OA.6 for a list of mental strategies.) By end of Grade 2, know from memory all sums of two one-digit numbers.
problem_activity: Task
Materials
Coins and dollar bills
Problem with table of costs displayed
{"table": [{"tbody": [{"tr": [{"th": [{"_value": "Stuffed Animals at the Pet Shop"}, {"_value": "Cost for each animal"}]}, {"td": [{"_value": "Dog"}, {"_value": "2 pennies, 3 nickels, and 1 quarter"}]}, {"td": [{"_value": "Snake"}, {"_value": "6 pennies, 2 nickels, and 2 dimes"}]}, {"td": [{"_value": "Bird"}, {"_value": "5 nickels, 3 dimes, and 1 quarter"}]}, {"td": [{"_value": "Cat"}, {"_value": "5 pennies, 5 nickels, 5 dimes, and 1 quarter"}]}, {"td": [{"_value": "Rabbit"}, {"_value": "7 pennies, 3 nickels, 2 dimes, and 3 quarters"}]}, {"td": [{"_value": "Frog"}, {"_value": "5 pennies, 5 dimes, 5 quarters"}]}, {"td": [{"_value": "Monkey"}, {"_value": "3 pennies, 3 nickels, 3 quarters"}]}]}]}]}
How much money would you spend if you purchased one of each animal at the pet shop?
If you have \$3 to spend at the pet shop, what animals would you buy?
What two animals could you buy if you have \$2 to spend? How much change will you get back?
How much money would you spend if you purchased the dog, snake, and the bird?
Make up a problem for your partner to solve.


aligns: no