Wednesday, February 10, 2010.

HANDWRITING
We brainstormed words that end in "y" that makes a "long i" sound such as why and Tyrannosaurus Rex. If you picked short words under 4 letters you wrote 5 words three times and if you chose longer words then you wrote three words three times. For both you wrote the date once.

MATH
We did the Explore activity on p-114 and figured out different ways to use mental math to subtract two-digit numbers. There are four different ways which may be used.

(1) Use a "friendly" number.

73 - 48 =
You can think 73 - 50 = 23 because 50 is friendlier than 48.
Then you need to add the difference between 50 & 48, which is 50 - 48 = 2, to your answer.

So 23 + 2 = 25

Therefore 73 - 28 = 25.

(2) You can count up to the number.

85 - 57 =
You start with 57 and add 3 to get to 60 and then you add 20 to get to 80 and then you add 5 to get to 85 or 57 + 3 = 60 + 20 = 80 + 5 = 85.

So 3 + 20 + 5 = 28

Therefore 85 - 57 = 28

(3) Use doubles.

63 - 30 =
You know that 30 + 30 = 60 and 3 more equals 63 so 30 + 3 = 33

Therefore 63 - 30 = 33

(4) Match the ones.

76 - 38 =
It is easier to do 76 - 36 = 40 and then since there is a difference of 2 between 38 and 36 so you subtract that 40 - 2 = 38.

Therefore 76 - 38 = 38

Then we started page 115.

COMPUTERS
We wrote a five sentence paragraph about our favourite planet and posted it to our blogs at Class Blogmeister.

DANCE
We practiced our solar system facts by showing the rotation and revolution of the Earth and moon around each other and the sun. We also lined up the Earth, sun, and moon in order to show a solar and a lunar eclipse. Then we had a race to see who could act out each planet and move across the gym. Our Solar System Science test is tomorrow.