Mental Math Jeopardy!

addition

100

(7x+4) + (2x - 5)

What is 9x -1

200

(-3a + 7) + (-5 - 7a)

What is -10a -2

300

(-x²  - 9xy + 5 y² ) + (  4x² - 2xy  - y² )

What is 3x² - 11 xy 4 y²

400

( 4x²w - 3 x²w²) + ( -8x²w² + 8 x²w)

What is 12x²w -11 x²w²

500

938 + 181

What is 1,119

subtraction

100

(-3a + 7) - (-5 - 7a)

What is 4a +12

200

(7x+4) - (2x - 5)

What is 5x +9

300

236-8

What is 228

400

(-x²  - 9xy + 5 y² ) - (  4x² - 2xy  - y² )

What is -5x² - 7 xy + 6 y²

500

( 4x²w - 3 x²w²) - ( -8x²w² + 8 x²w)

What is -4 x²w +5 x²w²

multiplication

100

2 x 9

What is 18

200

(4x+ 2)(4x+2)

What is 16x² +16 x + 4

300

(-3g + 1)(9+g)

What is -3g² -23g +9

400

(-x²   + 5 y² )  (  4x²   - y² )

What is -4x⁴ + 19x²y² -5y⁴

500

( 4x²w - 3 x²w²) ( -3x²w² + 3 x²w)

What is 12x⁴w² -21 x⁴w³ +9 x⁴w⁴

division

100

x⁴p⁹   /   zr⁵

What is x⁴p⁹ / zr⁵

200

Y⁰  

What is   1

300

24 ÷6

What is 4

400

72x⁴q⁴ ÷8 x⁷q⁷

What is 9 /x³ q³

500

56 ÷7

What is 8

story problems

100

I have 16 pens. You have 12 pens. How many do we have in all?

What is 28 pens

200

You have 28 toy cars. I have 46 toy cars. How many more cars do you need to have the same amount that I do?

What is 18 more cars

300

Thirteen people are in our math group. How many hands are there? How many fingers?

What is 26 hands and 130 fingers.

400

I have 52 toy car wheels. How many cars can I build with these wheels?

What is 13 cars

500

I baked 2 dozen cupcakes. Each cupcake had 3 cherries on top. I ate the cherries off 2 of the cupcakes. How many cherries are left?

What is 30 cherries