4th Grade Math

Missing Variables

1

Find the missing variable:

a + 16 = 20

a = 4

1

b - 51 = 1

b = 52

2

c X 4 = 20

c = 5

2

70 / d = 14

d = 5

3

x³ X y² = 31

x = 3³

y = 2²

Order of Operations

1

5 x 10

50

1

25 / 5

5

2

2026 + 4628

6654

2

4721 - 4701

20

3

25 x 5 - 90

35

Fractions, Decimals, and Percentages

1

Convert into percent

5/10 =?

50%

1

Covert into decimal:

75% =?

0.75

2

Convert into fraction:

66.6% =?

2/3

2

Convert into decimal:

1/5

0.2

3

a. Convert into a percentage

b. Convert into a fraction:

3.25

a. 325%

b. 3 1/4

U.S Customary System

1

Convert into pounds:

64 ounces

4 lbs

1

Convert into pints:

6 cups

3 pints

2

Convert into gallons:

8 pints

1 gallon

2

Covert into hours:

300 minutes

5 hours

3

Convert into tons:

14000 pounds

7 tons

Metric System

1

Convert into kg:

1000 grams

1 kg

1

Convert into cm:

5 meters

500 cm

2

Convert into hm:

90 dekameters

9 hm

2

Convert into Megaliters:

100,000,000 liters

100 megaliters

3

Convert into mg:

1 kg

1,000,000 mg