Division, patterns and estimating quotients 10 25-10

Division

Patterns and Estimating Quotients

Arrays

Division Math Vocabulary

• Compatible Numbers– Numbers in a problem that are easy to work with mentally.

• Division– An operation that is the opposite of multiplication. It breaks

a number up into even groups.• Dividend

– A number that is being divided• Divisor

– The number by which the dividend is being divided• Quotient

– The answer or result of a division problem

Dividing Mentally!

600 ÷ 6 =

100

Dividing Mentally!

270 ÷ 90 =

3

Dividing Mentally!

25,000 ÷ 500 =

50

Draw a Picture to Solve

92 ÷ 4 =

Draw a Picture to Solve

78 ÷ 6 =

We can Round in Division Too!!!

The Puppy Problem

Find a Compatible Dividend

Estimate 156 ÷ 3156 ÷ 3

150 ÷ 3

= 50

We change 156 to 150 because 150 and 3 are compatible numbers

Find a Compatible Divisor

Estimate 3,200 ÷ 903,200 ÷ 90

3,200 ÷ 80

=40

We change 90 to 80 because 32 and 8 are compatible numbers.

Bring to the Nearest TenEstimate 228 ÷ 43

228 ÷ 43

228 ÷ 40

240 ÷ 40

=6

We change the dividend to a number that is compatible with 4. Look, It’s easy to divide 24 by 4.

We change the divisor to the nearest 10.

Three Ways to Round

45 ÷ 6 = 45 ÷ 6 = 45 ÷ 6 =

Real-World Problems

Exact Answer:

12 oz.: __________

20 oz.: __________

Estimated Answer:

12 oz.: __________

20 oz.: __________