5th Grade Math Competition

Powers of 10

100

What is 10 risen to the third power?

1,000

200

5x10⁸=

500,000,000

300

10x10³

10,000

400

Marla has 2 truckloads of cookies each truckloads has 10⁴. How many cookies are there in all?

2,000

500

85x10⁵=

8,500,000

Multiplication

100

Choose the correct answer for 12x5

A.50

B.70

C.60

C.60

200

 Chose the best answer for 12x7

A.59 

B.84

C.94

B. 84

300

9x12

A. 108

400

4x44

176

500

84x9

A.636

B.756

C.845

B. 756

Multiply with decimals

100

.1 x 176 

17.6

200

1.2 x 5

6

300

.2 x 45

9 or 9.0

400

6.5 x .8

5.2

500

15.6 x 6

93.6

Rounding

100

round to ten 

872

870

200

Round 1.16 to the nearest whole number

1 or 1.00

300

Round 15,156 to the nearest thousand

15,000

400

Round 444 to the nearest hundred

400

500

round to the ten billions place

                    2,617,678,689,971

2,620,000,000,000

Multiplication Properties

100

Use the Commutative Property of Multiplication for this problem

4.5 x 3.2 = ____ x 4.5

3.2 x 4.5 = 14.4 

200

3x9+4=3x(9+4)=

Solve using the distributive property

3 x 9 + 4= 3 x (9+4)

39

300

67 x (5+(-4))=????????

67!!!!!!!!!!!!!!!!!!! P.s. we search it up :3

400

77 x 5 x (6+20)=

10010 

500

186 x (56 x 8.1) =

84369.9