CA 1 Practice Flashcard

Front

What is expanded notation?

Back

Expanded notation is a way of writing numbers that shows the value of each digit. For example, 80.05 can be written as (8×10) + (0×1) + (0×0.1) + (5×0.01).

Front

How do you convert expanded notation to a numeral?

Back

To convert expanded notation to a numeral, you add the values together. For example, (8×10) + (5×0.01) = 80 + 0.05 = 80.05.

Front

What is the best estimate for the cost of 7.8 pounds of watermelon at $3.05 per pound?

Back

The best estimate is $24, as 7.8 is close to 8, and 8 x 3.05 is approximately 24.

Front

How do you round a number to the tenths place?

Back

To round to the tenths place, look at the hundredths place. If it's 5 or more, round up; if it's less than 5, round down. For example, 0.64 rounded to the tenths place is 0.6.

Front

What does it mean to order numbers from greatest to least?

Back

Ordering numbers from greatest to least means arranging them starting with the largest number and ending with the smallest.

Front

If Lily's sunflower is the third tallest, what does that tell you about the other sunflowers?

Back

It means there are two sunflowers taller than Lily's and one or more that are shorter.

Front

How do you write (3 x 1) + (4 x 0.1) + (6 x 0.01) + (2 x 0.001) as a numeral?

Back

The numeral is 3.462, calculated as 3 + 0.4 + 0.06 + 0.002.

Front

What is the value of the digit 4 in the number 4.56?

Back

The value of the digit 4 in 4.56 is 4, as it is in the whole number place.

Front

What is the value of the digit 5 in the number 4.56?

Back

The value of the digit 5 in 4.56 is 0.5, as it is in the tenths place.

Front

What is the value of the digit 6 in the number 4.56?

Back

The value of the digit 6 in 4.56 is 0.06, as it is in the hundredths place.