A walk to the stables

A walk to the stables
Tamerin at the horses: we walked there on Thursday and talked rugby nearly all the way!
Showing posts with label Subtraction.. Show all posts
Showing posts with label Subtraction.. Show all posts

Saturday, February 19, 2011

Getting out of math’s mud

The past month hasn’t been much fun – we mostly did math – stole from other subject periods to finish the previous day’s homework… Tammy really struggled with most of the math we did – especially problems like converting recipes. But she has nevertheless shown much improvement in all areas. Here are a few examples of the types of problems we did:

Time calculations e.g.

  • On Saturday Tammy went to bed at 21:30 and she woke at 5:15. How long did she sleep?
  • Nick Jonas wants to phone Tammy on her birthday at 19:00. What day and time will it be in California then?” “Lana wants to phone Tammy at 21:00 on her birthday. What day and time will it be in Australia then?
  • The April holiday starts on 16 April and ends on 3 May. How many weeks/ days is that? (She calculates this without a calendar and then checks on the calendar to see whether she is right. These sums involved much subtraction, adding and division by 7.)
  • Why time calculations? Because it is important in every day life as well as tourism and geography – two of her subjects. Whereas other people just pick up these skills, Tammy has to practice a method for everything.

Adding or subtraction e.g.

  • Tammy invited 25 guests to her birthday party. 4 said they could not come. How many guests can she expect?
  • Tammy received 14 gifts. She has already opened 6 gifts. How many more gifts must she open?
  • Why? She still struggled with such basic problems, although we did a lot of them last year. I am convinced though that if we keep on practicing these, the ability to apply mathematical solutions to a variety of problems will emerge.

If one then multiply, if many then divide problems:

  • The following recipe is enough for 6 people. How must Tammy change the recipe so that it is enough for 25 people? (Divide ingredients by 6 and multiply with the number of guests. Round the answer – you cannot use 3.75 chicken or measure 7.33 ml salt or 990 ml sauce.)
  • Shaen will take 5 photos of each guest. How many photos will he take when there are 20 / 25 / 30 guests?
  • If one plate costs R25, how much will the dinner for 30 people cost – i.e. how much will 30 plates cost?
  • For the problems we whisked out the abacus and number line again. We drew pictures and real objects. And we practice and practice and practice. The conversion of recipes is part of lesson 1 of Grade 10 mathematical literacy, and both of us are determined to crack it – not only for the lesson, but forever!

Multiplication and division

  • How to multiply with 25: Since 25 = 1/4 of 100, divide by 4 and multiply with 100. These problems also took several exercise sheets, before she could do it. Once she got the hang of it, it was fairly easy, but then she would apply the same “recipe” when multiplying 10 x 25! Of course you can divide 10 by 4 and multiply the answer with 100, but it is so much quicker to just add a zero!
  • Besides the 1-12 tables, to also be able to count in 15’s and 25’s. To know the answers to 60/4, 4 x 15, 3 x 15, 45/ 3, 75/ 3, 3 x 25 100/ 4, 1000/ 4 etc. etc. This is much more fun and she loves it, if she “gets” me, i.e. if she can give the answer very fast!
  • Percentages: this is nothing new, but it requires continuous practice. Also to understand what it meant when you run at 50%, 80% and 100%! (Water aerobics)

There is still a massive elephant to be eaten and for Tamerin the bites can never be too small. I am just grateful for the few mouthfuls that she has been able to digest. Let’s pray that these skills will stick forever!

Friday, February 6, 2009

Dialogue practice, Speech Dividends and an imaginary trip.

This week we continued with reading my abridged version of the "High School Musical" book. Tammy enjoys it, but even with the "easier" words and expressions, she still does not read as fluently as I have hoped she would. Comprehension is a little better though. I really want to get her to just read for the story's sake and enjoy it.

I have written down the dialogue between Troy and Gabriella (main characters in the movie) where they talk to each other after they have just met, and again after they have met again at the school. In between the two dialogues there is a short linking monologue by a nervous Gabriella expressing her fears and hopes for the new school.

The idea is that Tammy and her brother will perform this on her birthday party on the 21st. Tammy loves practising this little 3 min skit and she laughs at the jokes. Memorisation has really helped to improve fluency of speech and pronunciation. (She in inclined to say sh for s and s for sh e.g sour for shower and sho for so). We break up difficult words or phrases and keep on repeating them until she pronounces them correctly and says them fairly fluently.

The speech of last year is paying dividents: because we "drilled" the contents so that she could say it, she still remembers the facts and now we can continue with the same themes e.g. she said last year "We hope the new president (Obama) will sort out their (U.S.) money problems. " This week we reviewed our own government. We talked about how we have a parliament whereas the U.S. has a congress and how our ruling party (the A.N.C.) has more than 2/3 majority allowing them to pass just about any bill they want to, whereas Obama has to get the support from the opposition as well. She said she hoped he sorted out their money problems now and I could tell her that it is just what he trying to do this week. (We just fetched her friend from school and Tammy told her that it was the opening of parliament today - her "normal" Grade 4 friend did not know what parliament was...! Tammyexplained that that was the place where "the president stood in front and talked" and in reply to my "But why do they talk so much there?", she answered "They make laws." Very satisfactory. )

Tammy's dad went to Angola this week. We talked about trips, flights etc. I then let her calculate how long the flight would be (subtraction). (She struggles a bit with subtraction, but true to form, is working hard and showing progress. ) Then we planned an imaginary trip - she would like to go to Albuquerque (where High School Musical took place). With my help, she checked rates of flights, hotels and car hire on the internet. This led to subtraction: how much more would it cost to go in July than now? and mulitplication where the rates were given in $ instead of ZAR. We calculated that it would cost about R44 000 to fly there, stay in a hotel for 2 weeks and hire a car, but we have not calculated how much feeding ourselves or seeing sights would cost! This was a fun exercise and we'll definitely do something similar at least once a week... but then next week is Valentine's day and they are going away for the weekend, so we have only 4 days to make our valentines. Adele has suggested lavendar bags... hope it's not too late to get started!

Have a great week!