Mystery 1
What unknown number makes the equation true?
10 x 4= 4 x __
10
What unknown number makes the equation true?
3 x8 = 8 x __
3
The shaded rectangle below has a length of 2 inches and a width of 8 inches. What is the area of the shaded figure?
16 square inches
The shaded rectangle below has a length of 5 inches and a width of 4 inches. What is the area of the shaded figure?
20 square inches
What unknown number makes the equation true?
10 x 12 = 12 x __
10
The city theater has 150 seats. For a concert, 2 sections of seats are being saved. There are 8 seats in each section. How many seats are left in the theater?
134
The city theater has 105 seats. For a concert, 5 sections of seats are being saved. There are 4 seats in each section. How many seats are left in the theater?
85
Ellie said that 3 × 6 × 2 is the same as 5 × 6 because you add 3 + 2 and then x 6. Ben says that she is incorrect because the product of 3 x 2 is 6, not 5. Who is correct?
Ben
Lisa was practicing number patterns, and made the list below.
2, 6, 10, 14
What rule did Lisa use to create her pattern?
A. Lisa multiplied by 4 every time.
B. Lisa added 4 every time.
C. Lisa subtracted 4 every time.
D. Lisa divided by 4 every time.
B. Lisa added 4 every time.
Mariah had 4 packs of stamps. Each pack contained 10 stamps. She used 5 of the stamps to send thank you notes. How many stamps does she have left?
35 stamps
Malcolm and Chloe are setting up rows of chairs for a class performance. There are 10 large chairs and 17 small chairs. They can fit 9 chairs in each row. How many rows of chairs will they be able to make?
3
Malcolm and Chloe are setting up rows of chairs for a class performance. There are 25 large chairs and 20 small chairs. They can fit 9 chairs in each row. How many rows of chairs will they be able to make?
5
Number of kids Beads Needed
2 8
3 12
4 16
5 20
6 ___
24
Number of kids Beads Needed
2 10
3 15
4 20
5 25
6 ___
30
Mariah had 9 packs of stamps. Each pack contained 10 stamps. She used 6 of the stamps to send thank you notes. How many stamps does she have left?
84 stamps
9. Ms. Westgard had her students arrange their 25 desks into 5 equal rows. Which equation shows how many desks are in each row?
A. 25divided by 5
B. 5 times 25
C. 25-4
D. 25+4
9. Ms. Westgard had her students arrange their 16 desks into 4 equal rows. Which equation shows how many desks are in each row?
A. 16 divided by 4
B. 4 times 16
C. 16 - 4
D. 16 + 4
A 16 divided by 4
A teacher is dividing her students into equal groups for a game. Each group must have an equal amount of students. If the teacher has 24 students,then how many groups could the teacher have? Choose ALL that apply.
A. 2 groups of 12 students
B. 3 groups of 9 students
C. 4 groups of 6 students
D. 3 groups of 8 students
E. 6 groups of 5 students
A
C
D
Solve. 5 × 40
A. 300
B. 200
C. 250
D. 450
B
16. Sarah solved the problem 8 x 0 = 8. She said that when you multiply by zero, the number doesn’t change. Do you agree with Sarah? Select the answer that best matches if you agree or disagree and your reason.
A. I agree, zero doesn’t change the number just like in addition
B. I agree, the array would be a single row of 8
C. I disagree, if you have 8 groups of 0 you have zero not 8.
D. I disagree, you put the zero with the 8 and the answer should be 80
C
Blythe claims that she can break the expression 8 × 9 up many ways to solve it. Enter the numbers that go in the boxes to support Blythe's claim.
(8 × _______________ ) + (8 × 5) = 8 × 9
(8 × 6) + (8 × _______________ ) = 8 × 9
4
3
Blythe claims that she can break the expression 7× 8up many ways to solve it. Enter the numbers that go in the boxes to support Blythe's claim.
(7 × _______________ ) + (7 × 5) = 8 × 9
(7 × 6) + (7 × _______________ ) = 8 × 9
3
2
Answer on whiteboard
Draw with a square with an area of 15 inches
Answer on whiteboard
Sabina has a jar full of dimes. A pack of cards cost 86 cents. How many dimes would she need to buy the cards if she uses no other coins?
9 dimes