A
6+6=
7+7=
what we call
doubles
5+6+5=？
16
9+9+1=？
19
8+2+4=？
14
2+8+7=？
17
31+59=?
90
92+18=?
110
45+15=?
60
18+22=?
40
89+11=?
How many teen numbers?
9
11 12 13 14 15 16 17 18 19
What's meaning of a quadrilateral?
4 sides 4 corners
Two different clocks
Analog clock and digital clock
Three different patterns?
Repeating/Growing/Shrinking
What's meaning of doubles?
58 - 39 = 19
52 - 47 = ___
5
31 - 29 = ___
2
64 - 58 =6
true or false
true
7, 14, ___, ___
21，28
Give 4 quadrilateral shapes
square
Rectangle
Trapezoid
Dimond
Rhombus
which 3d shape has 5 faces, 1 square face, 4 triangular faces? 5 corner?
Square-based pyramid
Which 2D 2 shapes have parallel lines and 90-degree angles?
squre
rectangle
Which 5 2d shapes have parallel lines?
square
rectangle
trapeziod
hexangon
octagon
square pyramid have ___faces,___corners, ____sides
square pyramid have __5_faces,_5__corners, _8__sides