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Addition
Subtraction
Rounding
Estimating
Geometry
100

548 + 589 =

1,137

100

7,432 − 3,685 =

3,747

100

Round 4,367 to the nearest 10.

4,370

100

347 + 218 ≈ ______

600

100

Which type of angle measures less than 90°?

Obtuse 

200

1,243 + 2,895 = 

4138

200

8,105 − 4,769 =

3,336

200

Round 7,241 to the nearest 100.

7,200

200

582 + 164 ≈ ______

800

200

Which type of angle measures exactly 90°?

Right 

300

4,327 + 2,518 =

6,845

300

6,214 − 2,857 =

3,357

300

Round 5,682 to the nearest 1,000.

6,000

300

726 − 341 ≈ ______

400

300

How can I describe a line segment?

A line segment is a piece of a line with two end points.  
400

6,154 + 3,729 =

9,883

400

9,003 − 5,468 =

3,535

400

Round 9,149 to the nearest 100.

9,100

400

493 − 178 ≈ ______

300

400
What are parallel lines?

Lines that go on forever and never touch.  

500

5,806 + 1,947 =

7,753

500

7,520 − 3,876 =

3,644

500

Round 3,758 to the nearest 10.

3,760
500

651 + 289 ≈ ______

900

500

What are perpendicular lines?

Lines that form a 90 degree angle.