6th Grade Math

Mental Math

100

20 x 8

160

200

5³

125

300

(40 x 2) + 9

89

400

(15-5) x 1 +3³

37

500

15 x (9-6) +4²

61

Exponents

100

100=x²

x=10

200

rewrite the equation with an exponent: 2x2x2x2x2=2^a

2⁵

300

Is this true: 72=2x6²

True

400

(8/27)=x³

x=2/3

500

Write an equation with exponents (not an exponent of 1) that equals 250

answers vary check with me

Equations

100

Solve: 12+x=30

x=18

200

Solve: 5x=100

x=20

300

Rewrite the equation so that y is the independent variable: y=(1/3)x

x=(3/1)y

400

Write an equation where d is dollars and a is apples. If each apple costs $2

d=2a

500

Write an equation where s is sugar and f is flour. If there is (1/4) cups of sugar for every cup of flour.

s=(1/4)f or f=4s

Distributive Prop

100

Distribute: 2(x+2)

2x+4

200

Distribute: (10+x)4

40+4x

300

Distribute: 5(x+y+z)

5x+5y+5z

400

Rewrite with parentheses: 25x+10

5(5x+2)

500

Rewrite with parentheses: 15x+30xy+5yz

5(3x+6xy+yz)

Math Riddles

100

There are seven apples, and you take away three. How many do you have?

3 apples

200

How many sides does a circle have?

2 - the inside and the outside

300

A phone and case cost $110 total. The phone costs $100 more than the case. How much is the phone?

Phone is $105 and the case is $5

400

I am a number, but when you add ‘g’ to me, I go away. What number am I?

ONE

(gONE)

500

On a farm, there are ducks and cows. There are 18 legs and 7 heads in total. How many ducks are there?

5 ducks and 2 cows.