2DCA Arrays, Length, Odd/Even
Name:________________________
1. Look at the picture below. How many dots in all? (2OA4)
a. 18
b. 15
c. 12
d. 9
------------------------------------------------------------------2. Which addition sentence matches the array? (2OA4)
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*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
a. 5 + 5 = 10
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b. 5 + 5 + 5 = 15
c. 5 + 5 + 5 + 5 = 20
d. 5 + 5 + 5 + 5 + 5 = 25
---------------------------------------------------------------------3. Rosie bought a sheet of stickers.
The stickers come in
4
rows of
5 stickers in each row.
(Part A): Draw a picture to show the amount of stickers Rosie bought. (2OA4)
(Part B) Write a number sentence to match your array: (2OA4)
___ + ____ + ____ + _____ = _______
-------------------------------------------------------------------
4. Mary baked 36 cookies. Her mom baked some more. When they finished,
they had
60 cookies in all. How many cookies did Mary’s mom bake?
(2MD5)
(Part A): Show your work in the box below
Mary’s mom baked ______cookies.
(Part B): Which number sentence below could NOT be used to solve the problem?
(a)
36+60 = ?
(b)
60-36 = ?
(c)
36 + ? = 60
2DCA Arrays, Length, Odd/Even
5.
Name:________________________
Look at the picture below. (2OA3)
(Part A) How many stars? _____Is the number of stars even or odd? _______________
(Part B) How many hearts?_____Is the number of hearts even or odd?_______________
(Part C) Is the total number of hearts and stars an even number or an odd number? ________
Explain how you know the total number of stars is Even or Odd:
----------------------------------------------------------------------------6. Jane was studying her doubles facts. Look at her flash cards below. (2OA3)
2+2= 4
3+3=6
4+4=8
5+5=10
6+6=12
She thinks that the sum is always an even number.
(Part A) Do you agree? YES or NO
(Part B) Draw a picture in the box below to prove it:
-------------------------------------------------------------------------Use the picture below to answer #7 and #8
7.
About how long is the crayon? (2MD3)
a. 8 inches
8.
b. 4 inches
c. 3 inches
d. 1 inch
About how long is the pencil? (2MD3)
a. 16 centimeters
b. 15 centimeters
c. 14 centimeter
d. 6 centimeters
2DCA Arrays, Length, Odd/Even
9. A real hammer is about how long?
Name:________________________
(2MD3)
a. 1 centimeter
b. 1 foot
c. 1 inch
d. 1 meter
----------------------------------------------------------------------------10. Shayla has two pencils. The first pencil is 5 cm long. The second pencil is
How much shorter is the first pencil than the second pencil? (2MD4)
12 cm long.
a. 5 cm
b. 7 cm
c. 12 cm
d. 17 cm
----------------------------------------------------------------------------11. Tom measured 3 fish and made this chart to show the results.
How many inches shorter is the gold fish than the catfish? (2MD5)
Tom’s Fish
Type of Fish
Length in Inches
Goldfish
4 inches
Bass Fish
6 inches
The goldfish is ______inches shorter than the catfish.
Catfish
8 inches
------------------------------------------------------------------------12. You are going to measure the length of the hallway from your classroom
to the PE door. (2MD1)
What measurement tool would you use? ____________________________
Explain why this is the best tool for the task.
___________________________________________________________________________
___________________________________________________________________________
___________________________________________________________________________
13. Sam and Joe both measured the length of the same pencil.
Sam measured in inches. Joe measured in centimeters.
(2MD2)
Which of the following choices could be the correct measurements for Sam and Joe?
(a) Sam = 4 inches
Joe = 9 cm
(b) Sam = 9 inches
Joe = 4 cm
(c) Sam = 9 inches
Joe =9 cm
How do you know?
___________________________________________________________________________
___________________________________________________________________________
14. Use your ruler to measure the line below. (2MD1)
___________________________________
(a)
About ______ inches
(b)
About _____
centimeters
2DCA Arrays, Length, Odd/Even
Name:________________________
15. Look at the picture below. How long is the crayon? (2MD1)
The crayon is _______ inches long.
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16. Sue’s dad was 75 inches tall. Sue’s mom is 61 inches tall. How much taller is
Sue’s dad than Sue’s mom? Show your work below. (2MD5)
Sue’s dad is _____ inches taller than Sue’s mom.
-------------------------------------------------------------------------BONUS: Use the clues to find the secret number.
The number is even. It has 5 tens. It is less than 54.
40
50
60
a. 56
41
51
61
42
52
62
43
53
63
44
54
64
b. 53
45
55
65
46
56
66
47
57
67
48
58
68
c. 52
49
59
69
d. 44