Book a Demo
Topics
N
u
m
b
e
r
(
a
d
d
/
s
u
b
)
S
i
n
g
l
e
D
i
g
i
t
A
d
d
i
t
i
o
n
a
n
d
S
u
b
t
r
a
c
t
i
o
n
A
d
d
i
t
i
o
n
f
a
c
t
f
a
m
i
l
i
e
s
(
a
+
b
=
c
,
c
-
b
=
a
)
F
a
c
t
F
a
m
i
l
i
e
s
(
I
n
v
e
s
t
i
g
a
t
i
o
n
)
Lesson
R
e
p
r
e
s
e
n
t
a
t
i
o
n
o
f
A
d
d
/
S
u
b
u
s
i
n
g
O
b
j
e
c
t
s
S
t
r
a
t
e
g
y
-
b
r
i
d
g
e
t
o
1
0
(
s
i
n
g
l
e
a
n
d
t
w
o
d
i
g
i
t
)
S
t
r
a
t
e
g
y
-
C
o
m
p
e
n
s
a
t
i
o
n
(
s
i
n
g
l
e
a
n
d
t
w
o
d
i
g
i
t
)
S
t
r
a
t
e
g
y
-
N
u
m
b
e
r
L
i
n
e
(
s
i
n
g
l
e
a
n
d
t
w
o
d
i
g
i
t
)
U
s
e
s
t
r
a
t
e
g
i
e
s
t
o
a
d
d
/
s
u
b
t
r
a
c
t
t
w
o
d
i
g
i
t
n
u
m
b
e
r
s
W
o
r
d
S
e
n
t
e
n
c
e
s
f
o
r
A
d
d
i
t
i
o
n
a
n
d
S
u
b
t
r
a
c
t
i
o
n
C
o
n
n
e
c
t
A
d
d
i
t
i
o
n
a
n
d
S
u
b
t
r
a
c
t
i
o
n
A
d
d
M
u
l
t
i
p
l
e
s
o
f
1
0
'
s
t
o
S
i
n
g
l
e
D
i
g
i
t
N
u
m
b
e
r
s
A
d
d
M
u
l
t
i
p
l
e
s
o
f
1
0
'
s
t
o
T
w
o
D
i
g
i
t
N
u
m
b
e
r
s
S
u
b
t
r
a
c
t
M
u
l
t
i
p
l
e
s
o
f
1
0
'
s
f
r
o
m
T
w
o
D
i
g
i
t
N
u
m
b
e
r
s
P
a
t
t
e
r
n
s
i
n
A
d
d
i
t
i
o
n
I
P
a
t
t
e
r
n
s
i
n
A
d
d
i
t
i
o
n
I
I
P
a
t
t
e
r
n
s
i
n
S
u
b
t
r
a
c
t
i
o
n
I
P
a
t
t
e
r
n
s
i
n
S
u
b
t
r
a
c
t
i
o
n
I
I
C
o
m
p
l
e
t
e
s
t
a
t
e
m
e
n
t
s
t
o
m
a
k
e
a
t
a
r
g
e
t
n
u
m
b
e
r
u
p
t
o
2
0
A
d
d
M
i
s
s
i
n
g
E
l
e
m
e
n
t
s
t
o
M
a
k
e
a
S
t
a
t
e
m
e
n
t
T
r
u
e
w
i
t
h
T
o
t
a
l
s
u
p
t
o
2
0
A
d
d
3
N
u
m
b
e
r
s
(
m
i
x
o
f
s
i
n
g
l
e
o
r
t
w
o
d
i
g
i
t
n
u
m
b
e
r
s
)
I
W
o
r
d
p
r
o
b
l
e
m
s
A
d
d
M
u
l
t
i
p
l
e
s
o
f
1
0
0
'
s
t
o
S
i
n
g
l
e
D
i
g
i
t
N
u
m
b
e
r
s
A
d
d
M
u
l
t
i
p
l
e
s
o
f
1
0
0
'
s
t
o
T
w
o
D
i
g
i
t
N
u
m
b
e
r
s
S
u
b
t
r
a
c
t
M
u
l
t
i
p
l
e
s
o
f
1
0
0
'
s
f
r
o
m
T
h
r
e
e
D
i
g
i
t
N
u
m
b
e
r
s
P
a
t
t
e
r
n
s
i
n
A
d
d
i
t
i
o
n
I
I
I
P
a
t
t
e
r
n
s
i
n
S
u
b
t
r
a
c
t
i
o
n
I
I
I
C
o
m
p
l
e
t
e
s
t
a
t
e
m
e
n
t
s
t
o
m
a
k
e
a
t
a
r
g
e
t
n
u
m
b
e
r
u
p
t
o
5
0
A
d
d
M
i
s
s
i
n
g
E
l
e
m
e
n
t
s
t
o
M
a
k
e
a
S
t
a
t
e
m
e
n
t
T
r
u
e
w
i
t
h
T
o
t
a
l
s
u
p
t
o
5
0
I
n
e
q
u
a
l
i
t
i
e
s
w
i
t
h
A
d
d
i
t
i
o
n
a
n
d
S
u
b
t
r
a
c
t
i
o
n
S
t
a
t
e
m
e
n
t
s
A
d
d
3
N
u
m
b
e
r
s
(
m
i
x
o
f
s
i
n
g
l
e
o
r
t
w
o
d
i
g
i
t
n
u
m
b
e
r
s
)
I
I
A
d
d
a
n
d
S
u
b
t
r
a
c
t
T
h
r
e
e
D
i
g
i
t
N
u
m
b
e
r
s
I
A
d
d
a
n
d
S
u
b
t
r
a
c
t
T
h
r
e
e
D
i
g
i
t
N
u
m
b
e
r
s
I
I
Log in
Sign up
Book a Demo
Canada
ON
Grade 3
Fact Families (Investigation)
Lesson
Interactive practice questions
There are no interactive problems for this subtopic
Outcomes
3.PA2.01
Determine, through investigation, the inverse relationship between addition and subtraction
What is Mathspace
About Mathspace
