Tuesday, February 2, 2010.

HAPPY GROUNDHOG DAY!

HANDWRITING
We brainstormed "tion" words which say "shun" such as invitation and attention. Write three "tion" words three times and the date once. Watch the February joins.

MATH
In partners the class did the Explore activity on page 110, which involved estimating and then sovling a 2 - digit number.

The class also discussed 3 strategies for solving 2 - digit subtraction.

Strategy 1

Use Base Ten Blocks:

54 - 36 =


54 5 ten blocks and 4 ones blocks

36 3 ten blocks and 6 ones blocks

Look at the ones blocks and since you can't do 4 - 6 you need to borrow from the tens.

Now you have

54 4 tens blocks and 14 ones blocks
36 3 tens blocks and 6 ones blocks

Now you can do 14 - 6 = 8 and you can do the tens blocks 4 - 3 = 1

So you have 1 tens block and 8 ones blocks or 18.

So 54 - 36 = 18.

Strategy 2

Use counting on to the larger number.

36 + 4 = 40 + 10 = 50 + 4 =54

So 4 + 10 + 4 = 18

54 - 36 = 18

Strategy 3
Use counting backward to the smaller number.

54 - 4 = 50 - 10 = 40 - 4 = 36

So 4 + 10 + 4 = 18

54 - 36 = 18

SCIENCE
We found out that the Groundhog saw its shadow so only two students predicted correctly that we'll have six more weeks of winter.
We read an article on Groundhog Day and answered questions about the story.
We coloured a groundhog and his hole and put together a picture of the groundhog, his hole, and the shadow he saw.