Math Jeopardy for 7th grade

Algebra :D

100

Find x.
2x + 3 = 5

x =1

200

True or False?
2x + x² = 3x

False

300

Solve x and y.
2(x + 3y) = 14x

x = 0,5y

y = 2x

400

Find x.
3x + 6 -x + 2/3 = 4x +5

x = 5/6

500

Solve x.
6x + 8 - 6x - 3 = 4x + 8 +6

x = -2 1/4 = -2,25

Decimals >:)

100

0,7 + 0,3

1

200

1,9 - 0,08

1,82

300

0,2 (3,2 + 8)

0,64 + 1,6 = 2,24

400

1,2
-----     x    40
  8

6

500

2,5 + 0,74 (2/3 x 3/2)

2,5 + 1,74 = 4,24

Perfect Squares ._.

100

7² + 2²

49 + 4 = 53

200

3^{2 +} 2^{2 -} 4²

9 + 4  - 16 = -3

300

(9)^2/(10)²  + (3)²/(10)2

81/100 + 9/100 = 90/100 = 0,9

400

30²/50²

900/2500

500

[(4^{2 +} 9²) - 10²] ²

[(16 + 81) - 100]² = [-3]² = 9

Radicals :-)

100

√81

9

200

√36 + √64

6 + 8 = 14

300

 √9          3
-----   +  ----
√25         5

3/5 + 3/5 = 6/5 = 1 1/5 = 1,2

400

√32 + √2

4√ 2 + √ 2 = 5√ 2

500

√128 + 2√2
--------------
      2√2

8√ 2 + 2√ 2       =      8√2
--------------
      2√2

Area :P

100

Find the area of the square.
a = 4cm

Area = 4cm x 4cm = 16cm²

200

Find the area of the rectangle.
a = 2cm
b = 10cm

Area = 2cm x 10cm = 20cm²

300

Find the area of the triangle.
a = 6cm
h = 5cm

Area = (5 x 6) / 2 = 30 / 2 = 15cm²

400

Find the area of the rhombus.
Diagonal a = 6cm
Diagonal b = 12cm

Area = (6 x 12) /2 = 72 / 2 = 36cm²

500

Find the area of the trapezoid.
a = 7cm

b = 13cm

h = 5cm

Area = (7 + 13) x 5         =   20 x 5        =
           --------------             ---------
                   2                          2

= 100/2 = 50cm²