Math examples "starter problems" (3rd grade level)

To solve 136 + 227

1. start with 100 + 200 = 300 (break both numbers by place value)

then:30 + 20 = 50
6 +7 = 13
300 + 50 + 13 = 363

or

2. start with 136 + 200 = 336 (keep the first number together)

then: 336 + 20 = 356
356 + 7 = 363

or

3. start with 136 + 4 = 140

then: 140 + 20 = 160
160 + 200 = 360
360 + 3 = 363

Which one makes the most sense to you? Try to help your child understand them all and then use the one that makes the most sense to him/her. What do you think about these strategies compared to traditional ones? Feel free to leave comments!

Wednesday's Homework

2nd graders have addition and subtraction story problems tonight. They need to read carefully to know which to do. They may draw pictures to represent the problem or use the "breaking numbers apart". For subtraction, it is easier to keep the first number together and break apart the second number.

Example:

35 - 12

35 - 10 = 25

25- 2 = 23

3rd graders are doing more with addition and using a number line strategy. They should use "landmark numbers" such as multiples of 10 or 100 on their number lines.

Math Help

There are addition problems for homework. I wanted to give some examples of the way we have been solving them in class. The emphasis is on place value.

2 Digit Addition

A strategy we use is "breaking the numbers apart"

For example: 12 + 24

Add the tens first 10 + 20 = 30

Then add the ones 2 + 4 = 6

Add both sums together 30 + 6 = 36

3 Digit Addition

You can use the same strategy "breaking numbers apart"

For example: 327 + 112

Add the hundreds first 300 + 100 = 400

Add the tens next 20 + 10 = 30

Add the ones 7 + 2 = 9

Add all three sums together 400 + 30 + 9 = 439

*You can also use pictures to represent these problems

Next week's spelling words

2nd- its, who, now, people, my

3rd- four, head, above, kind, began

Challenge- feathers, environment, adapt, survive

Thursday's Homework + overdue library books + Halloween party

Math homework
2- pg. 1,2
3- pg. 4,5

Spelling skill sheet tonight!

Activities and logs due tomorrow!

The Halloween party will be on the 27th. That is a half day, therefore, the party will be from 10 to 11:45. All primary grades have the same time. Originally, I gave the room moms the wrong time. Sorry!

Overdue Library Books
The Hiding Place
Diary of a Wimpy Kid
Mushy Gushy Valentine, Junie B. Jones

If you have any of these titles please return.

Thanks!

Tuesday's Homework

2nd- pg. 6,7
3rd- pg. 47,48

Math homework tonight

2nd- pg. 21

3rd- pg. 54, 57