Vocab
An ordered list of numbers is called a ________.
Sequence
Write one tenth as a fraction and a decimal.
1/10 ; 0.1
16.7
2.4 ____ 2.3
>
2.35 + 1.82
4.17
Each number in a sequence is called _______.
Term
Draw a representation for 1.23 (use base ten blocks).
One flat, 2 longs, 3 small cubes
When rounding, how do we know if we are going to round up, or keep the number the same?
2.49 _____2.48
>
12.56 - 5.18
7.38
A familiar number used as a point of reference is called a _________.
Benchmark Number
3.954
What place value is the 4 in?
Round the decimal .809 to the hundredths place.
.81
9.300 _____ 9.3
3.14 + 2.9
6.04
To find a number that is close to an exact amount is an________.
Estimate
6.234
What is the value of the 2?
.2 or 2 tenths
Use benchmarks to estimate the sum of the following numbers:
.18 + .43
.25 + .50 = .75
Order the numbers from greatest to least:
2.007 2.714 2.09 2.97
2.97, 2.714, 2.09, 2.007
Devon had a length of rope that was 4.78 meters long. He cut a 1.45 meter length from it. How much rope does he have left?
3.33 meters
To replace a number with one that is simpler and is approximately the same size as the original number.
Rounding
Write the following number in word form and expanded form:
8.517
eight and five hundred seventeen thousandths
(8x1) + (.1x5) + (.01 x 1) + (.001 X 7)
Use benchmark numbers to estimate:
8.12 + 5.52
8.00 + 5.50 = 13.50
Name the greatest place value position where the numbers differ. Name the greater number.
3.579 3.564
Hundredths Place
3.579 is greater
Anton rode his bike three days in a row. He biked 12.1 miles on the first day, 13.4 miles on the second day, and 17.9 miles on the third day. How many miles did Anton bike during the three days?
43.4 miles