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Addition
Strategies
Math Facts
Subtraction
Math Facts
100
Quick! Mental Math! Solve 10 + ____ = 45
What is 35?
100
I can solve 10-6 by ....
What is adding up from 6 or counting down from 10
100
To make a plan I:
What is Find a pattern, guess and check, make a table, use manipulatives
100
What is the inverse to Subtraction?
What is Addition
100
Quick! What would we round 34 to? Why? A) 40 B) 50 C) 30
What is 30, because it is the nearest ten
200
Addition is the inverse to what?
What is Subtraction
200
Quick! Mental math! 16+5 equals A) 43 B) 25 C) 21
What is C) 21
200
I can solve the problem by:
What is drawing pictures, using numbers and words
200
What are other words for Subtraction?
What is difference, take away, less than, minus or decrease
200
If I was given 57 what would I round it to? Why? A) 75 B) 60 C) 50
What is B) 60
300
Name two addition and or subtraction strategies we have used in class:
What is hundreds charts, base ten blocks, counters and or number lines.
300
Using a hundreds chart I can solve 89-14
What is 75
300
Quick! Mental math! Solve 45 + 32 =
What is 77
300
Quick! Mental Math! Solve 78-23 =
What is 55?
300
My hundreds column is on the left, right or middle?
What is left
400
Quick Mental Math! Solve 56 + 23
What is 79
400
Solve this fact family using addition and subtraction in four ways: 5 6 and 11
What is 5+6=11, 6+5=11, 11-5=6, 11-6=5
400
Quick raise your hand if you like using base ten and one blocks, look around the room ... how many hands are up?
What is _____
400
The subtrahend is the number that needs to be: A) Subtracted B) Added c) Ignored
What is A) Subtracted
400
Is my ones column on the left or the right? A) Right B) Left C) Middle
What is A) right
500
What are the fact families using addition and subtraction for 4, 3 and 7?
What is 4+3 =7, 3+4=7, 7-4=3 and 7-3=4
500
What are friendly numbers and why do we use them?
What is numbers we have rounded to make them easier to add or subtract
500
In order to check my work (Mikes and Mirrors) I must:
What is look back at my work, is it reasonable? Check my problem by solving it another way.
500
To understand the problem I must:
What is circle what I know and underline the problem
500
Quick! Turn to your elbow partner and ask them to round 33 to the nearest ten. Did they get the same answer as you? Why or why not?
What is 30