This video shows families a game that is easy to play at home! Using playing cards (A-10) children find pairs that equal 10. They can also add more than two cards to equal a sum of 10. This game reinforces the 2nd grade strategy of “Making a 10” – this strategy helps students solve more difficult equations too.
Mental Math - Breaking Numbers Apart
A student demonstrates the “Break it Up” strategy using tens frames. He begins with the problem 7 + 5, he is able to show how he breaks up the five in order to make a ten, which makes the problem easier to solve.'
Open Number Line
Teacher explaining the open number line strategy to add 47 + 38 = ___. She decomposes 38 into 10+10+10+3+5 to find the sum of 85.