Number Sense Test: Dec 5

The Grade 3s will be having a math quiz on Monday, December 5, 2016.  For the quiz, students need to know the following:

Learning Intention:   We are learning to…

• add and subtract 2 and 3-digit numbers mentally and in standard form
• estimate the sum and difference
• use CUBES to solve story problems involving addition and subtraction       

Success Criteria

I can…

• Add and subtract 2 and 3-digit numbers with and without regrouping / carrying / trading using the standard algorithm.

   (with regrouping)      (without regrouping)

122       122                     122        128

         +119     -119                   +117      - 117

            241         3                      239          11

• Use and explain some mental math strategies to add.

Possible strategies are:

Compensation, Counting on with Number Line, Partial Sums, Base Ten Model

• Use and explain some mental math strategies to subtract.

Possible strategies are:

Counting on with a Number Line, Partial Differences, Base Ten Model, Counting Up, Friendly Numbers

***Students do not need to use all mental strategies.

• Estimate the sum or difference.

76 + 42 =                  134 – 25 =

80 + 40 = 120           130 – 30 = 100

• Use CUBES to solve story problems involving addition or subtraction.

Billy has 15 books.  Sally has 23 books.  How many books do they have altogether?

• Circle:  Circle the numbers
• Underline:  Underline the question
• Box:  Box the key words  : altogether (+)
• Evaluate: Evaluate and draw (use numbers, pictures, and/or words):

15 + 23 =  38

Base-ten blocks:  |. . . . .  +  || . . .  = |||  . . . . . . . .

I added the number of Billy’s books to the number of Sally’s books.

• Solve and Check:
• Billy and Sally have 38 books altogether.

Students need to take home their math duotang in order to be well prepared for the quiz.  They must bring their duotang back to school each day as we will be reviewing the concepts in class.  Thank you!