ATI TEAS Guide To Math | Basic Decimals Question Review

Now, count the number of decimal places in the two numbers being multiplied. There are two decimal places in each number, for a total of four decimal places. The correct answer must also have four decimal places. Count back four decimal places from the right of 77, adding zeros if necessary, and insert a decimal. The correct answer is 0.0077.

In this set of numbers, the largest number is 0.7. It has a 7 in the tenths place, while the other numbers have zeros in the tenths place. The number 0.07 is the next largest number. It has a 7 in the hundredths place, while 0.007 and 0.0007 have zeros in the hundredths place. The number 0.007 is larger than 0.0007, so choice A is correct.

Set up the long division problem:

0.04√3.20

Move the decimal points two places to the right in both numbers:

40√320

Perform long division, the correct answer is 8.

First, multiply 411 times 6 without the decimals:

411 x 6 = 2,466

Now, count the number of decimal places in the two numbers being multiplied. There is one decimal place in 41.1, and there are two decimal places in 0.06, which gives a total of three decimal places. The correct answer must also have three decimal places. Count back three decimal places from the right of 2,466 and insert a decimal. The correct answer is 2.466.

Add up the numbers 0.00393 and 0.0241, be sure to keep the decimal points aligned. The correct answer is 0.02803.

First, set up the problem:

0.12√72

Next, for both numbers, move the decimal points to the right two places. Add two zeros to the right of 72, to create 7,200:

12√7,200

Now, divide as normal, and the correct answer is 600.

In this set of numbers, the only difference between the numbers is the number in the hundredths place. The numbers in the hundredths place are 4, 5, 6, and 7. So, the decimals should be placed in that order: 0.0413, 0.0513, 0.0613, 0.0713. Choice A is correct.

Multiply 25 times 75 without the decimals:

25 x 75 = 1,875

Next, count the number of decimal places in the two numbers being multiplied. There are two decimal places in 0.25 and three decimal places in 0.075, for the total of five decimal places. The correct answer must therefore also have five decimal places. Count back five decimal places from the right of 1,875, adding zeros if necessary, and insert a decimal. The correct answer is 0.01875.