Unit 6 Math Review

Multiplication

100

What is 2x4?

8

200

What is 2x6?

12

300

What is 3x5?

15

400

What is 4x7?

28

500

Show two ways to solve 8x6

-8 rows with 6 in each

-6 rows with 8 in each

-8 circles with 6 tallies in each

-6 circles with 8 tallies in each

Answer - 48

PEMDAS

100

Solve using PEMDAS

4+5-3=?

4+5-3=

9-3=

Answer=6

200

Solve using PEMDAS

(8-3)+10-2=?

(8-3)+10-2=

5+10-2=

15-2=

Answer=13

300

Solve using PEMDAS

3+(5x3)=?

3+(5x3)=

3+15=

Answer=18

400

Solve using PEMDAS

(7+4)-(5x2)=?

(7+4)-(5x2)=

(7+4)-10=

11-10=

Answer=1

500

Solve using PEMDAS

5+12x2-5+(18/3)=?

5+12x2-5+(18/3)=

5+12x2-5+6=

5+24-5+6=

29-5+6=

24+6=

Answer=30

Subtraction

100

Solve

200-100=?

200-100=100

200

Solve

150-50=?

150-50=100

300

Solve

356-105=?

356-105=251

400

Solve

743-478=?

743-478=265

500

Solve

945-529=?

945-529=416

Written Explanation

100

If Josiah had 5 packs of cookies and each pack had 2, how many total cookies does Josiah have?

5 packs x 2 cookies per bag = 10 total cookies

200

Hadley is solving 548-124. The answer she got was 424. Is she correct? Explain why her answer is right or wrong.

She is correct because when you solve 548-124, you start with the ones place so 8-4=4, then you move to the tens place 4-2=2, then lastly the hundreds 5-1=4

So the answer is 424 which is CORRECT.

300

Explain how Jenny solved 8x3

8x3=4x3+4x3

8x3=12+12

8x3=24

She used doubling by cutting 8 in half (4 and 4) and solved 4x3 twice to get 12 + 12 which is 24. So 8x3=24

400

You bring 24 donuts to the sleepover. There are 6 friends at the sleepover. How many donuts does each person get? Fill in the chart and use a letter to represent the unknown number.

Donuts|Donuts per friend|Total friends

Donuts|Donuts per friend|Total friends

24.             d.                       6

24/6=4

D=4

Each friend gets 4 donuts

500

There are 6 tables with 3 in each group. There is one table with 4 students. How many students are in the class? Use the operation below to solve

(6x3)+4=?

6 tables with 3 students = 18 students

1 table with 4 students = 4

18+4=22

There are 22 total students in the class.

Divison

100

Solve

6/3=?

6/3=2

200

Solve

8/4=?

8/4=2

300

Solve

10/5=?

10/5=2

400

Solve

40/8=?

40/8=5

500

Solve

49/7=?

49/7=7