Adding and Subtracting Multiplying and Dividing Decimal Numbers

When adding or subtracting with decimals, you -

• Move decimals out

• Shift decimals 3 places over

• Line up the decimals

• Ignore decimals

The place value right after the decimal is called the __________.

• tens

• tenths

• thousands

• hundrenths

-40 + 15.05

• 55.05

• 24.95

• -24.95

• 14.65

When adding decimals with the same sign you.....

• subtract and take the sign of the larger number

• add the opposite

• add and keep the sign

• subtract and keep the sign

-12.4 + 9.2 + 1 

Mathematical Equivalence

ON

-.5 + .5 =

• 1.0

• -1.0

• 10

• 0

92.37 ÷ 0.5

• 184.74

• 18.474

• 1840

• None of the above

When adding decimals with different signs you....

• subtract and take the sign of the larger number

• add the opposite

• add and keep the sign

• subtract and keep the sign

In what types of problems do you have to make sure the exponents are the same before beginning to compute?

• Adding and Subtracting

• Multiplying and Dividing

• Subtracting and Dividing

• Adding and Multiplying

When ​ (a)   decimals, I must always ​ (b)   the decimals.

• adding or subtracting

• line up

• multiplying or dividing

• get rid of