Decimal Review...batter up!

Batter up! It’s time to

review decimals

Today we will review…

•Comparing•Ordering•Rounding•Multiplying•Dividing•Estimating•Word

problems

What is a decimal?•A decimal is a fractional number and is indicated by digits after a period which is called a decimal point.

COMPARING AND ORDERING

•Line up the decimals.

•Fill in the empty spaces with zeroes.

•Compare from the left.

Work these!

• 3.45 _____ .4591

• .432 ; .3128 ; .4219 ; 1.2

• .562 ; .2891 ; 2.34 ; 2.1

ROUNDING!!!•Find the rounding place.•Look to the right of the rounding place.• If the number is five or greater, round up.• If the number is less than five, your

rounding place stays the same.•Numbers behind the rounding place turn

to zeroes in FRONT of the decimal.•Numbers behind the rounding place fall

into the water BEHIND the decimal

Work these!

• Round to the tenths: 3.2678

• Round to the hundredths: 125.6728

• Round to the ten thousandths: 2.387198

MULTIPLYING!!!

•Line up the numbers.•Count the number of digits behind

a decimal point•Multiply the numbers like you

would whole numbers•Put the decimal at the end of the

answer and move it the number of places you counted in step two.

Work these!!!

• 34.56 x 6.5

• 8.973 x 7.6

DIVISION!!!

• Move the decimal to the end of the outside number.

• Move the decimal the same number of places on the inside number.

• Put the decimal on the roof.• Divide like you would with whole

numbers.• If you have a remainder, add zeroes

behind the decimal and continue dividing.

Work these!!!

• Round Quotients to the nearest hundredths!

• 56.789 ÷ 4.5

• 2.3866 ÷ .73

ESTIMATION!!!•Round to the highest place value!!

•Then work the problem!

Work these!!

• Estimate:

• 23.57 + 48.9

• .341 - .156

• .5879 x 1.78

Word Problems!!•READ IT!•PLAN IT!•SOLVE IT!•CHECK IT!

• Sarah bought 28 packages of peanuts at $2.38 each. How much did she spend?

• Trenton’s band made $142.50 playing a gig last week. If there are five members in the band, how much did each member receive?

• Megan went to the grocery store and bought 3 pounds of apples at $.99 a pound, a box of cereal at $3.21, and two cokes at $1.19 each. If Megan gave the clerk a $20 bill, how much change would she receive?

• A large cargo plane can carry 87.5 tons. Tanks weighing 4.5 tons are being loaded onto it. What is the maximum number of tanks it can carry?