Tremendous
Thursday!
We
began the day having gym with Ms. Lovan.
After,
we learned about adding and subtracting two
digit numbers.
When adding and
subtracting, we need to make sure to begin with the ones column.
When adding, if the sum of
the numbers in the ones column equal 9 or more, we need to make sure to carry
over.
1
|
19
+ 13
________
32
Subtraction:
When subtracting we need to
keep in mind that sometimes we may need to borrow from the neighbour next door:
24
- 19
________[we cannot take 9
away from 4 so we need to borrow from the tens column]
24 (the 2 represents
20)
- 19 (the 1 represents 10)
______
24
- 19
_____
First we need to borrow 10
from the 20 and give it to the 4.
20-10=10
We then give the 10 to the
4: 10 +4 =14
We can now subtract 14 from
9 and that gives us 5.
24
- 19
_______
5
Since we borrowed 10 from
the 20, the 2 now becomes a 1.
14
-19
_____
05
Here is another strategy:
Here is another strategy:
Students were given an
addition and subtraction package to practice adding and subtracting two-digit
numbers. It is important that students understand how to do so for our current
math unit. We spent an hour and a half on math today to ensure students had
enough time to understand and complete their work.
After first recess and
lunch, we continued working on our addition and subtraction package.
Then we watched a Bill Nye
the Science Guy video about Architecture. Afterwards, we discussed the
important points from the video. We talked about the different materials that
buildings can be made of and how structures need a strong base so they will not
fall down. We also discussed how architects ask many questions when the begin
planning such as: what will the structure be used for? Will it be a home? An Office building?
We will continue watching
this video tomorrow. Students can also watch this video at home:
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