Addition
28 + 35 = ?
63
62 - 28 = ?
34
How many inches are in a foot?
12 inches
What is a shape with 3 sides?
Triangle
14, 16, 18, 20 (What comes next?)
22
What is the missing number?
47 + ___ = 83
36
82 − 46 = 46
Do you agree? Explain.
No. The answer is 36.
A book is 24 centimeters. Another book is 5 centimeters shorter. How long is it?
19 centimeters
A cube has 6 flat surfaces. What are those flat surfaces called?
Faces
Which numbers are even: 7, 10, 13, 18
10 and 18
Find two different numbers that add to 85.
Many answers (40+45, 50+35, etc.)
What is the missing number?
___ − 46 = 27
73
Three crayons measure 4 inches, 6 inches, and 9 inches. What is their total length if placed end to end?
19 inches
What is the name for a corner of a 3D shape?
Vertex, Vertices
What number am I?
I am even.
I am greater than 50.
I have a 6 in the tens place.
Many answers (60, 62, 64, 66, 68)
Which equation does NOT equal 100?
A. 46 + 54
B. 72 + 28
C. 61 + 40
D. 35 + 65
C (101)
Liam has 92 baseball cards. Maya has 58 baseball cards.
How many more cards does Liam have than Maya?
34
Which could be about 1 foot long?
A. A paperclip
B. A classroom door
C. A ruler
D. A school bus
C. A ruler
How many vertices does a cube have?
8
A class collected 87 cans.
They packed the cans into boxes that hold 10 cans each.
How many boxes will they need?
9 boxes
"If I add 10 to a number, only the tens digit changes."
Is that always true?
No. Example: 95 + 10 = 105.
A second-grade class has 100 cubes. They use 37 cubes to build a tower and 28 cubes to build a bridge. How many cubes are left?
35 cubes left. (100 − 37 − 28 = 35)
A student measured a desk with paper clips.
Another student measured the same desk with index cards.
They got different numbers.
Why could both students still be correct?
Different-sized units produce different counts.
I am a 3D shape. I have 8 vertices, 12 edges, and 6 faces. All my faces are rectangles, but I am not a cube. What am I?
Rectangular Prism
A teacher counted all the shoes in the classroom and found 48 shoes.
How many students might be in the room?
24 if everyone has 2 shoes