Town of Subtraction
Today, we are going
to bridge through
multiples of 10 to
work out addition
sums along a
number line.
Town of Addition
Think!
What does
bridging
through 10
mean?
Why
10?
This is the Great Numberline River
and we are going to bridge across
it.
Our Bridge can only have posts in
the river on multiples of 10.
Think!
What does are
multiples of
10?
What do
multiples
of 10 look
like?
17 + 8 = 25
17
10
20
25
30
40
50
60
70
80
90
100
Bill built a bridge that was 18 feet long. The next
day he added 6 feet. How long was the bridge
altogether?
10
20
30
40
50
60
70
80
90
100
25 + 7 =
10
20
30
40
50
60
70
80
90
100
Beth built a bridge that was 34 feet long. The
next day she added 8 feet. How long was the
bridge altogether?
10
20
30
40
50
60
70
80
90
100
6 + 67 =
10
20
30
40
50
60
70
80
90
100
Independent Activity
Use the bridge through multiples 10 to answer
the addition sums on the sheet.
10
20
30
40
50
60
70
80
90
100
Help
Valerie!
Valerie, like you, has
been learning to bridge
through multiples of
10.
She’s having a little
trouble. Can you help
her?
Help
Valerie!
Valerie, like you, has
been learning to bridge
through multiples of
10.
She’s having a little
trouble. Can you help
her?
Help
Valerie!
Valerie, like you, has
been learning to bridge
through multiples of
10.
She’s having a little
trouble. Can you help
her?