5th review

powers of 10

100

2.6 X 10¹ =

26

200

47.2 X 10³=

47,200

300

24.93 x 10² =

2,493

400

0.671 x 10⁴ =

6710

500

.02548 x 10⁴ =

254.8

expanded notation

100

76

70 + 6

200

346

300 + 40 + 6

300

10752

10,000 + 700 + 50 + 2

400

93,752

90,000 + 3000 + 700 + 50 + 2

500

6,057,807

6,000,000 + 50,000 +7,000 +800 +7

X with decimals

100

15 X 2.3

34.5

200

.42 X 25 =

10.50

300

.36 x 59 =

21.24

400

2.74 x .30

0.8220

500

.4701 x .42 =

0.197442

Rounding with decimals

100

Round to nearest 1's place: 4.3

4

200

Round to nearest 1's place:  7.53

8

300

Round to nearest 1's place: 68.46

69

400

Round to the nearest 1's place: 2.75

3

500

Round to the nearest 1's place:  641.090

641

Which operation? -, +, ÷ or x

100

You and one friend are sharing skittles. You both want the same amount. What operation will you use when you share?

Division, the amount in the bag separated into two fair shares.

200

You are going on a hike and carrying 4 bottles of water weighing 16 ounces each. What operation will you use to find out how much weight in water you will carry?

Multiplication 16 X 4 OR repeated addition 16 + 16+ 16+ 16

300

During a three day hike you hike 2.4, 4.6 and 5.3 miles. What operation will you use to find out the total miles you hiked?

Addition to find the total of miles hiked.

400

Your pet iguana needs 1.5 teaspoons of food each day. How many teaspoons of food will he eat in a week?

Multiplication: 1.5 X 3 equals how many teaspoons in a week.  OR  repeated Addition 1.5 +1.5+1.5=

500

Your dog needs three cups of kibble a day. There are 30 cups of food in a bag. How many days of food are in a bag?

Division, 30 cups ÷ 3 cups = how many days of food are in a bag.