Which place value do we start adding at?
Ones
What is mental math?
Mental math means doing math in your head without using pencil or paper.
Count by 100 to 1000.
100 200 300 400 500 600 700 800 900 1000
How do you write 958 in expanded form?
900 + 50 + 8 = 958
Solve.
866
Solve.
843
Solve.
918
What number is this?
683
What number is being represented by the base ten blocks?
358
What number is being represented by the base ten blocks?
402
Solve 230 + 100 =
330
Solve 456 + 100 =
556
What do we call when we make a group of ten to make it easier to add or subtract?
Regrouping
How is an open number line different from a regular number line?
An open number line does not have any numbers on it. You can write your own numbers on it to help you solve equations.
20 Second dance party! GO!
DANCE!
