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Jenny last won the day on September 8 2017

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About Jenny

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  1. Place value tiles

    I have never had an issue with any differences in color. I just marked round counters. They do not use them for numbers larger than 9999, if your child does not understand place value by then there is a problem. But, they do have a picture of cards instead of discs in 5A and ten thousands is darker blue and hundred thousands yellow (arbitrary colors).
  2. Test 5A Unit 4 Test 5B

    Draw a bar, divide it into 5 units, indicate that the last 2 units are red. Add a part to the bar on the right, label it as 12. No, the last 2 units plus the 12 is equal to 2/3 of all her hairpins. Therefore, the first 3 units is equal to 1/3 of all her hairpins. Since 3 units have to equal 1/3, then 6 units have to equal 2/3, but you have 2 units and 12. Therefore, the 12 must be 4 units of the same size as you started with. Each unit is therefore 12 div 4 = 3. She started out with 5 units. 5 x 3 = 15
  3. Primary math 6 vs. Dimensions Math 6

    Yes, your child can go from Standards Edition 5 to Dimensions Math 6. You can see a table of contents for each book at our web site by clicking on the book's title or image and then clicking on Contents_Sample. Dimensions Math 6 includes the topics in Common Core Standards for grade 6. So it does have some topics considered pre-algebra. It is formatted differently in that lesson exercises (every 1-3 day's worth of lessons) is in the textbook, so the workbook, when there is one, is supplemental, that is, simply more problems. A teacher's guide will be simply something that will help divide the longer lessons into what can be done in a day, reiterate what is in the textbook, give some additional solutions (there are answers at the back) and some additional activities for starting a lesson, and notes on the material in the textbook, i.e. things teachers should watch out for. It should be out in time for next school year.
  4. Textbook 6B, Review 5, page 42, #6a

    You have four lengths tat are r, that is 4r part. Then you have the two quarter circles. Together they would be same as a half circle. Circumference if a half circle is 2 pi x r x 1/2, or pi x r. Or, you can calculate it as 2 x circ. of quarter circles, but it simplifies to the same.
  5. Textbook 6B, Review 5, page 41, #3

    2 x pi x 10 x 3/4 + 20 = 67.1 is what I get.
  6. Textbook 6B, Practice A, page 40,# 6

    For the area of the semi-circle, you forgot to multiply by 1/2. See if that gives you the answer.
  7. Textbook 6B, Review 5, page 41, #2

    The distance from the vertical line to the edge of the semi-circle is the radius of the semi-circle, which is half its diameter, and therefore half of the diameter of the quarter circle. So the 21 cm is half again the radius of the quarter circle. You would have to divide the 21 cm by 3 and multiply by 2 (the radius of the quarter circle is 2/3 of 21), so 14, and that is the diameter of the halfcircle. The radius of the half circle is 7, if that is what you are saying. So to find the area of the quarter circle, you would calculate 22/7 x 14^2 x 1/4. Not sure why you are multiplying by 49.
  8. The question is asking for the height of the syrup level. So you would divide the volume of the syrup by the area of the base.
  9. The differences may be whether you and whether the person doing the answers used the calculator value for pi, which is out more than 4 places, 22/7, which is an approximation, or a value for pi rounded to a few decimal places. I am not going to take the time to calculate it all three ways to determine which you did and which the solution writers did.
  10. The area of a triangle is 1/2 x base x height. The area of the parallelogram is base x height. These are both in the textbook. You are using the textbook, are you not? If not, you need to be. On p. 120 of the workbook, for (b), that is a parallelogram with base 10 and height 7. It is just like the one in the TB on p. 125 but different bases and heights is all. For (d), There is a parallelogram with base 4 and height 2, one (actually a rectangle, which is denoted by the little squares showing right angles (with base 4.5 and height 2), a triangle with base 4 and height 1, and another triangle with base 2 and height 4 (the height here is the base of the parallelogram it is next to.
  11. Do you mean 3 and 3/8, the mixed fraction? It can't be that, there are only 6 eighths. So, there are 3 eighths with the 1/8 x 3, and then three more, so 6 in all, so the missing number is 6. If I am looking at the same problem you are. The answer (missing number) is not 4.
  12. There are sample pages available, see http://www.singaporemath.com/Singapore_Math_samples_s/257.htm But there is not a lot of differences, they will look quite similar. I prefer the Standards edition because it adds back in a little bit from the second edition of Primary Math (the US edition is based on the third edition) that was cut way back when. A review of equivalent fractions in grade 4 for example. Fraction multiplication as not just fraction of a set, but also repeated addition (both are multiplication but the ideas behind them are different as to what constitutes the groups and what the number of groups). Some problems added back to the reviews. Also, the Home Instructor's Guide is more thorough. And I like it better than the Common Core edition because I like the periodic practices, which are not in the Common Core edition, and I like the cumulative reviews, the reviews in the Common Core edition just cover the chapter. And I don't like some of the Common Core things, like an area model for division, and line plots of measurements to the nearest fraction of an inch. But those things are minor, even if you do decide on the Common Core edition. I don't think any of them are more or less challenging. Standards edition has some topics US does not, Common Core has some others US edition does not, but the basic content is similar in all. It is not like students using the US edition were any less prepared than those that might be currently using the Common Core edition, for some reason, as it was the edition that started the rise in fame, after all.
  13. It depends on what your needs are. Do you want to be sure all common core topics are at least covered, at the expense of cumulative reviews and no Home Instructor's Guide? Do you want the one with the best Home Instructor's Guide. Do you want the one with the fewest topics, as that is one of the hallmarks of Singapore Math. Do you mind that the textbook is not in color at grade 3 and up. At the base, all three editions are the same. All three will prepare for advanced math. See http://www.singaporemath.com/FAQ_Primary_Math_s/15.htm For which level, see https://www.singaporemath.com/Homeschool_Planning_Chart_s/229.htm My own preference is for Standards edition through grade 5 only. If you change your mind, say after grade 2, you can get grade 3 in another edition. So it is not a committed all the way choice. There are supplemental titles that do offer more challenge.
  14. We will announce if we are discontinuing it, and give plenty of time to buy workbooks. Whether any math book continues in publication depends on whether it continues to be purchased in adequate numbers.
  15. You are correct, that is an error in the guide. Thanks for letting me know.