Math Madness

Say What Shape?

100

Mental Math

A = (b*h)/ 2

TRIANGLES

200

Mental Math

A = B * H

RECTANGLE

300

What is this the area of?

A = B * H 

Parallelograms

400

What is this the area of? 

A = 1/2 h (b1 + b2)

Trapezoid

500

What is the radius of a circle in comparison to the diameter? 

Radius is half the diameter

Subtract!

100

Mental Math

10 - 20 

-10

200

Mental Math

Fiona wants to buy a phone charger worth $42, but she only has a $50 bill How much change will she receive?

$8.00

300

Mental Math

60 - (-30) = 

90

400

649-318

331

500

562-191

371

Add!

100

MENTAL MATH

-37 + 68 = 

31

200

-345 + 134 = 

-211

300

MENTAL MATH

98 + 499 = 

597

400

MENTAL MATH

32 + x = 24

 x = -8

500

MENTAL MATH

155 + x = 546

391

Multiply!

100

MENTAL MATH 

8x = 72

x = 9

200

MENTAL MATH

25x = 325

x = 13

300

Mental Math 

4x + 12 = 28

x = 4

400

Mental Math

5x + 30 = 80

x = 10

500

Mental Math

1/2X = 50

x = 100

Divide!

100

42 / 6

7

200

Mental Math

54 divided into 6 groups

9

300

MENTAL MATH

40/x = 5

x= 8

400

MENTAL MATH 

45/x + 5 = 14

x = 5 

500

MENTAL MATH

x/6 + 18 = 24

x = 36

Number squared

100

What is 5² ?

25

200

What is 9²

81

300

What is 25² ?

625

400

What is 45² ?

2025

500

What is 65² ?

 4,225