Rounding, Estimating, Adding, and Subtracting Decimals
100
What is the "dot" in the number 32.5 called?
Decimal point
100
Write the decimal in words. 55.23
Fifty-five and twenty-three hundredths
100
2 and 1 tenths centimeter = ___________ cm
2.1 cm
100
Is 6.54 less than, greater than, or equal to 6.45?
6.54 is greater than 6.45
100
Round the decimal to the tenths place. 3.423
3.4
200
What is it called when you add the front-end digits and estimate the sum of the remaining digits?
Front-end estimation
200
Write the decimal in words. 6.011
Six and eleven thousandths
200
10 and 5 tenths millimeters = _______ mm
10.5 mm
200
Is 2.536 less than, greater than, or equal to 2.541?
2.536 is less than 2.541
200
Round the decimal to the place value of its leading digit. 0.0056789
0.006
300
What is the name of the property that states that you can add numbers in any order?
Commutative Property
300
Write the number as a decimal. Three hundred and one hundred six thousandths
300.106
300
4 and 9 hundredths meters = ________ cm
409 cm
300
Is 9.7 less than, greater than, or equal to 9.70
9.7 is equal to 9.70
300
Estimate the sum of the decimals using rounding. 5.38 + 6.65
12
400
What is the name of the property that states that the value of a sum does not depend on how the numbers are grouped?
Associative Property
400
Write the number as a decimal. Two hundred seven ten-thousandths.
0.0207
400
5 and 5 thousandths meters = _______ mm
5005 mm
400
Put the following decimal numbers in order from least to greatest. 0.298, 0.336, 0.283, 0.332
0.283, 0.298, 0.332, 0.336
400
Use front-end estimation to estimate the sum. 1.02 + 3.7 + 0.8 + 6.4
12
500
Identify the property being illustrated.
(4.3 + 6.2) + 9.8 = 9.8 + (6.2 + 4.3)
Commutative Property
500
The Hoover Dam is about two hundred twenty-one and forty-one hundredths meters tall. How many CENTIMETERS tall is the Hoover Dam?
22,141 centimeters
500
3567 meters = _______ km
3.567 km
500
Explain how to compare decimal numbers and put them in the correct order from least to greatest
First, you stack the numbers on top of each other, lining up the decimal point. Then you add any zeros on to the END of decimal numbers so that they all have the same number of digits. Finally, you start to compare the numbers from left to right.