What is addition?
•How else can we say add?
•Do numbers get bigger or smaller?
•Can we add more than one number together?
•When might you use addition?
On a whiteboard…
We biggest
are going to setTout aUcalculation in a column.
The
Now, we’re
number
ready to
always goesWe are going to do 35 + 12 add…
3 5
on the top!
+
1
2
On your boards, write it down so that your
4 looks
7the units,
calculation
like this…
First, we add
together
and write the
What’s
our
total in the
unitsanswer?
column…
Next, we add together the tens, then we write the
total in the tens column…
Let’s try another…
youifsetyou’re
out 47 + 11?
Let’sCan
see
right!
Does it look like this…
Which
Have
a go
column
do
at adding
weunits…
add
the
first?
T
U
4
+ 1
5
7
1
8
Which
Have
a go
column
do
at adding
wetens…
add
the
second?
Let’s get tougher…
This time, we’re going to try H T U!
On your boards, show me how you think you’d
lay out 321 + 123…
H T
U
3 2
+ 1 2
4 4
1
3
4
Fantastic- let’s practice!
Head over to your tables and have a go at the
questions on your sheets…
Remember…
• You MUST only write one digit in each box
• You MUST make sure your digits are underneath
the correct place value.
• You MUST show what calculation you are doing
with a + symbol
• You MUST leave a line between each question
• You MUST leave a line between your place values
and calculation.
Right- let’s step it up…
Sometimes you add
H numbers
T U which give a total
of 10 or more…
1
We know that we can only have 9 units before it
3
6
4
becomes a ten, or 9 tens before it becomes a
2 2 7before it becomes a
hundred, or+9 hundreds
5 9and1 so on…
thousand
Let’s practice one more…
H T U
1 1
2 7 6
+ 5 4 5
8 2 1