Math

Multiplication by 2 digit numbers

100

15X20=

15x20=300

200

24x32

24x32=768

300

19x33=

19x33=627

400

26x20=

26x20=520

500

17x21=

17x21=357

Multiplication by 3 digit numbers

100

145x10=

145x10=1,450

200

341x24

341x24=8,184

300

453x25

453x25=11,325

400

107x53=

107x53=5671

500

120 x 20 = 

120x20=2400

Exponents

100

7 x 10⁴ =

7 x 10⁴ = 7 x 10 x 10 x 10 x 10 = 70,000

200

3 x 10 ⁵ =

3 x 10 ⁵ = 300,000 

3 x 10 x 10 x 10 x 10 x10 

300

find the missing number (exponent)  

12 x ----- = 12,000

12 x 10³ = 12,000

400

find the missing number (exponent)  

9 x ----- = 90,000

9 x 10^{5 =} 90,000

500

5,000 x 3,000=

write in exponential form

5,000+3,000= 15 ,000,000

15 x 10⁶

Find the missing #

100

40 x 70,000 = 28 x 10 ^--

40 x 70,000 = 28 x 10⁵

200

60 x 5,000 = 3 x 10 ^---

60 x 5,000 = 3 x 10 ⁵

300

(6x9) x 10 ³ =

(6x9) x 10 ³ = 54,000

400

(5x4) x 10 ⁴ =

(5x4) x 10 ⁴ = 200,000

500

(3x8) x 10 ⁴ =

(3x8) x 10 ⁴ = 240,000

Word problems

100

A shipping company buys 60 trucks for $30,000 each. What is the total cost?

60 x 30,000 = $ 1,800,000 or 18 x 10 ⁵

200

Martha runs 1,860 yards each day for 4 days. How many yards is she running 

Martha runs 7,440 yards

300

A farmer has a pumpkin field with 7 rows of corn. Each row has 1,289 corn plants. How many corn plants does he have?

The farmer has 9,023 corn plants.

Thats a lot of corn!

400

The trick or treaters are coming! The family gives each child 15 pieces or candy. There were 345 trick or treaters that night! Wowww! How much candy did they give out. 

5,175 pieces of candy! I hope they all brushed their teeth after that! 

500

Mrs. Mondo buys pizza for the party at school? There are 21 kids in each class and there are 37 class. How much pizza did she buy?

777 pieces of pizza