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Warm-Up Write the answer you got on #2, 4, 6 p.710 in word form . Example: 0.8 > 0.67 eight tenths is greater than

Estimating Sums and Differences Estimating sums and differences can be achieved by rounding the same place value in all numbers

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Page 1: Estimating Sums and Differences Estimating sums and differences can be achieved by rounding the same place value in all numbers

Warm-UpWrite the answer you got on #2, 4, 6 p.710 in word form.Example: 0.8 > 0.67 eight tenths is greater than

sixty-seven hundredths

Page 2: Estimating Sums and Differences Estimating sums and differences can be achieved by rounding the same place value in all numbers

Multiplication Estimation

• When multiplying, Always round to the highest place value of each number!!! DO NOT round single digits!

•Always drop the decimal point and the zeroes after the decimal!!!

Page 3: Estimating Sums and Differences Estimating sums and differences can be achieved by rounding the same place value in all numbers

Each house needs 18.7

bags of candy.

There are 7 houses that need candy.

How many bags of candy does he need?

Page 4: Estimating Sums and Differences Estimating sums and differences can be achieved by rounding the same place value in all numbers
Page 5: Estimating Sums and Differences Estimating sums and differences can be achieved by rounding the same place value in all numbers

25.98

X 15

30.00

20x

600

157.09

X 33.57

200

30x

6,000

Page 6: Estimating Sums and Differences Estimating sums and differences can be achieved by rounding the same place value in all numbers

Division Estimation

• When dividing, Always round to division friendly numbers!!! DO NOT round single digits!

•Always drop the decimal point and the zeroes after the decimal!!!

Page 7: Estimating Sums and Differences Estimating sums and differences can be achieved by rounding the same place value in all numbers

The neighborhood needs 302.8

pieces of candy.

Each house gets about 48.2

pieces of candy to hand out.

About how many houses are in the neighborhood?

Page 8: Estimating Sums and Differences Estimating sums and differences can be achieved by rounding the same place value in all numbers

=

Page 9: Estimating Sums and Differences Estimating sums and differences can be achieved by rounding the same place value in all numbers

7 22.98

217 = 3

82.523.8

80 20 = 4