Practice #5 Answers
Read through the answers below. If you missed any questions,
review this section and then try the additional practice. (NOTE:
There are no detailed solutions to this practice.)
- Complete the following addition problems.
- 26.86 + .925 = 27.785
- Remember to line up the decimal points.
- Notice that when you add the digits in the tenths place (8
+9 = 17) you must carry a 1 to the ones place.
|
|
- 19.034 + 2.67 = 21.704
- One way to line up the decimal points is to add zeros where
one number does not have a digit. (2.67 = 02.670)
|
|
- Complete the following subtraction
problems.
- 20 - 11.95 = 8.05
- Remember to line up the decimal points.
- In this problem we must carry numbers all the way from the
2 in 20 to be able to complete the subtraction.
|
|
- .34 - .287 = .053
- In subtraction, adding zeros as place holders is essential. Notice
how we need to add the zero at the end of the .34.
|
|
- Complete the following multiplication
problems.
- .38 x 1.6 = .608
- Remember, do the multiplication as if these were whole numbers.
- When you are done, count out the decimal places. 2 places
for .38, one place for 1.6 gives three decimal places in our
answer.
|
|
- 24.55 x .004 = .0982
- In this example, we only need to multiply 2455 by the 4 to
get 9820.
- Then we add on the 5 decimal places needed to get the 0.09820
- Note we have to add another 0 before the decimal point to
have enough places.
|
|
- Complete the following division problems.
- First set up the traditional division equation.
- Shift the decimal point over the required number of places
so the divisor is a whole number.
- Perform the division as usual.
|
becomes
|
- When we move the decimal point over two places, so that the
divisor of 0.02 is a whole number, the dividend still has a decimal.
- The decimal point in the answer is directly above the decimal
point in the dividend.
|
becomes:
|
|
|
|
If you did each of these correctly you should move on to the
next section on. If you had any problems with this practice you
should try the additional practice.
