3A Mrs. Pagano

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Image result for free clipart images for fall
Reminders:
The IOWAS will continue to be administered this Tuesday, October 16th thru Thursday, October 18th.
Due to the IOWAS we will have Music this week on Friday instead of Thursday. Please make sure recorders are brought to school for this Friday.
This week's Spelling words are a review from the last 5 weeks. Your child will receive the list on Monday, so these will be the 20 words for the upcoming week.

As we start to do multi-column subtraction, homework will say do vertically on looseleaf. This was reviewed on Meet the Teacher Night. Please make sure the looseleaf is returned as it allows me to see if and where your child is having any difficulties.


Math Terminologies
:

ESTIMATION RULES:
1. Decide which 2 places the number is between.
Ex. 17 is between 10 and 20 
Ex. 168 is between 100 and 200
2. Look at the place value 
before the place you are rounding to. If that digit is 5 or higher round up. If it's 4 and lower round down.
Ex. If you're rounding to the 10's look at the 1's place. 17 would round to 20
Ex. If you're rounding to the 100's place look at the 10's place. 168 would round to 200
Ex, If you're rounding to the 1000's place look at the 100's place. 1,264 would round to 1,000
3. If you're rounding two different places always round both to the lowest place. This is used when we will be estimating sums. 
Ex. 34 + 489 would be 30 + 490 = 520 In this example both places would be rounded to the tens place.

ADDITION PROPERTIES:
Commutative Order Property- It doesn't make a difference which order 
the addends are in the sum is the same.
Ex. 4 + 5 =9 5+4 =9

Associative Order Property- It doesn't make a difference how you group the addends the sum is the same.
Ex. 3 + (2 +9)=14  or (3 + 2)+ 9=14
Identity Order Property- Any addend plus zero equals itself.
Ex. 6 + 0= 6