Our Word Wall
Just a reminder of the word wall words for the month of January: can your child read, spell and write these words? The word wall in our classroom is growing each month as we add about 5 new words each week. At the end of April, we will have all 110 words posted and then continue to work on phonics, spelling patterns and daily use and mastery of all words.
Jan. 3rd--day, was, saw, in, out
Jan 9th--there, teacher, ride, animal
Jan. 18th--school, people, how
Jan. 23--but, nice, on, off
Jan. 30--up, down, can't (cannot), won't (will not)
And now the Mathematics Problem: Choose the number of trays that best challenges you!Jan 9th--there, teacher, ride, animal
Jan. 18th--school, people, how
Jan. 23--but, nice, on, off
Jan. 30--up, down, can't (cannot), won't (will not)
There were (12, 25, 32) cafeteria trays on the shelf to be washed. Miss Debbie washed 9 of the trays. How many still need to be washed. Challenge yourself to use a known fact to solve the problem. Can you solve this some, some went away problem in more than one way? Respond to the problem by commenting below for a treat on Monday!
I could draw all the cafeteria trays as rectangles on a piece of paper and then cross out the 9 that have been washed. However, that would take the longest to figure out how to solve. Could I think about what I know about 12-10, or 25-10, etc and then know that I would have to add one more to my result because I only took away or washed 9 of the trays--that would be using a known fact and be a more efficient way to solve the problem. --Mrs. A
ReplyDeleteCanyon solved the problem saying if there were 32 trays and 9 were washed there would be 23 left. He solved the problem by starting at 32 and counting bqskwards (using9 fingers). After we talked about using 32-10 and adding back the difference he was able to solve the problem that way too.
ReplyDeleteCanyon,
ReplyDeleteYou used a counting backwards strategy first and then by challenging yourself to trying the known fact strategy too! Both are effective and efficient ways to solve problems...Treat on Monday!
To answer the question, AJ took 25 beans, removed 9 and had 16 left. She really struggled coming up with a way to solve this problem. Afterward, I did the same problem with 12 dirty trays. She just knew 12 - 9 is 3.
ReplyDeleteBrady first chose 12 trays first. He identified that 9+3 is 12 so if you take away 12 than you have 3 left over.
ReplyDeleteAJ, you used a counting all strategy for the 25-9 and 'Just Knew' for the 12-9
ReplyDeleteBrady you used a know addition fact to help you think about how to solve the subtraction problem.
I have some Goldfish crackers for all three of you!
Makenna chose 32 trays and said the answer is "23". She said that "if you have 32 and take 10 away, you get 22. Then if you add 1 more you get 23."
ReplyDeleteMadysen completed this problem by counting cubes to find the answer. She had 25 cubes and took 9 away to get an answer of 16.
ReplyDelete