7th Grade Math Competition

Expressions

100

-3.4z + 1.1 - 2.3z - 8.2

-5.7z -7.1

200

-1/3x - 6 + 2/3x  - 3

1/3x - 9

300

Identify the terms and like terms in this expression.

x - 4 + 3 - 5x²

Terms: x, -4, 3, -5x²

Like Terms: -4 and 3

400

Factor 3x + 15y using the GCF

3 (x + 5y)

500

Factor -1.8 out of 3.6b - 9.

-1.8 (5 - 2b)

Equations and Inequalities

100

Solve the equation.

-3 = z - 8

z=5

200

Solve the equation.

-10 = -b/4

b=40

300

Solve the equation.

-1/3 (4 + z) = -5/6

z = -1 1/2

400

Write the word sentence as an inequality.

A number y is no more than -8.

y</= -8

500

Write the word sentence as an inequality.

A number t multiplied by -4 is at least -2/5

-4t >/= -2/5

Ratios and Proportions

100

Fill in the blank.

Calories    20     ?

Miles        1/6   2/3

80

200

Fill in the blank.

Tea (cups)         3.75     ?

Milk (cups)        1.5       1

2.5

300

Find the unit rate.

180 miles in 3 hours.

60 mi/hr

400

Find the unit rate.

5/8 ounce per 1/4 pint.

2 1/2 oz/pt

500

Tell whether x and y are proportional

x   1   2   3

y   7   8   9

no

Percents

100

Write the fraction as a decimal and a percent.

7/8

.875 and 87.5%

200

What percent of 25 is 12?

48%

300

20% of 150 is what number?

30

400

Find the percent of change.  State whether it is an increase or decrease.

50 pounds to 35 pounds.

decrease 30%

500

State the sale price.

Original price = $69.80

Discount = 60%

Sale price = ?

$27.92

Mystery

100

Calculate interest earned.

$600 at 5% for 2 years.

$60

200

Find the absolute value.

l -18.26 l

18.26

300

Double Jeopardy

Complete the statement using >, <, or =.

l 4.9 l ___ l -5.3 l

400

-41 + (-15) + (-29)

-85

500

15/4 + ( -4 1/3)

-7/12