How many squares on a chessboard? How many rectangles?
This is a great problem for grades 1 and up!
From Peter Liljedahl’s Good Problems
Egg Timer
How do you make a 9 minute egg if all you have is a 4 minute and 7 minute egg timer?
From Peter Liljedahl’s Good Problems
A Dice Game without Dots
From: https://www.nctm.org/
Suki and Jon are playing a dice game. Suki gets a 3 and a 5. Jon gets a 2 and a 6.
Without counting the dots, can you tell who has more altogether? How do you know?
*Grades K-2
Answer Check:
They both have the same total.
If your answer does not match our answer, did you
- act it out?
- draw a picture?
- talk in your group?
If your answer does match ours, did you
- explain?
- write a number sentence?
- help anyone in your group?