You may bring 1/2 page of notes to this quiz.
Types of problems that may be on the quiz:
- Tell what CGI type a particular problem is
- Write a word problem of a given CGI type
- Tell which of two CGI types is the more difficult for children to understand/figure out
- Describe how to solve problems of each of these types by direct modeling:
- Describe how to solve problems of each of these types by using the associated counting strategy:
- Draw a labelled bar diagram for a word problem of any of the CGI types, and write the associated addition and subtraction number sentence(s) (note: a missing whole problem will typically have only one number sentence (addition), but a missing part problem should have two associated equations: a subtraction equation and a missing number addition equation).
- For any subtraction problem, make a bar diagram, and write the associated missing number addition problem. Some more bar diagram examples
- Describe how to solve a near doubles problem by using a convenient double fact (use 10-frames and equations)
- Describe how to solve an appropriate addition problem by the make 10 strategy (use 10-frames, number lines and equations)
- For an appropriate subtraction problem, show add up using 10 to solve it. (use number lines and equations)
- For a 2-digit addition problem, show how to solve it using the strategies from the homework:
- Add on using multiples of 10 as bridge numbers on an open number line
- Add in place values and combine
- Add the higest place values and compensate
- For a 2-digit subtraction problem, show how to solve it using the strategies from the homework:
- Add up using multiples of 10 as bridge numbers on an open number line
- Negative numbers algorithm
- Subtract the highest place values and compensate.
2-digit resources
Sample problems