Rounding
+/- Algorithms
Estimating
Measurement
Geometry
100
Round the number 38,284 to the nearest hundred.
38,300
100
315 + 544 =
859
100
316 is between which two tens?
310 and 320
100
1 foot = _____ inches
12
100
A square has ____ right angles.
4
200
Round 3429 to the nearest thousand.
3000
200
284 - 177 =
107
200
32,428 is between which two thousands?
32,000 and 33,000
200
1 yard = ____ feet
3
200
Draw line segment AB
(see board)
300
Round 393928 to the nearest ten-thousand.
390,000
300
519 + 1294 =
1813
300
Julia earned $12 each week for mowing the lawn. Estimate how much money she will earn in 4 weeks.
40 (or another reasonable answer)
300
6 feet is equal to how many inches?
72 inches
300
What is a right triangle?
a triangle with ONE right angle
400
Round to the nearest thousand. 29,703
30,000
400
4153 - 2918 =
1235
400
Marco needs 125 cupcakes. Mary made 54, Judy made 29, Pablo made 41 and Amy made 13. Will he have enough? Estimate your answer.
Yes (about 130)
400
There are _____ feet in 10 yards.
30 feet
400
Draw parallel lines CD and EF.
(see board)
500
Round to the nearest hundred thousand. 1,290,485
1,300,000
500
32,009 - 22, 284
9725
500
Why is rounding estimation (or ballpark) more beneficial than front end estimation?
Rounding (or ballpark) is usually more accurate than front end.
500
4 yards is equal to ______ inches.
144 inches
500
How is parallel different from perpendicular?
Parallel lines will never touch, perpendicular lines intersect at a 90* angle.
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