Answers to Math Practice Paper 1!!

(Please note that there were mistakes with question 18 and 22. Thank you Ernest for spotting it!!! Be alert! Help me spot!)

1. Five thousand, six hundred and twelve
(look out for the comma, and remember no 's' after hundred and thousand.)
2. 2463
(I must see the arrows in 2 directions. One for checking REMEMBER? )
3. 6277
(I MUST see 2 workings! one addition and one subtraction for checking!)
4. 3315
(MODEL! remember to check by adding answer back to get the result. Highlight the words 'result is 5400' since result is given, you subtract to find the answer.)
5. 1783 (CHECK! ADD!)
6. 3957
(highlight the words 'spending' and 'left' so we will be looking for total at first.)
7. 63 (No reason to get this wrong!)
8. 820
(highlight the word 'altogether'. Important! When you multiply 205 by 4 and not by 3. Please draw a model for this kind of question. Divide an CHECK!!)
9. 6
(Group the 8+8+8+8+8+8 together to get 6 groups of 8)
10. 42
(Draw!)

The above 10 questions are 1 mark each. Total up your marks up till here and write down upon 10.

11. 900
(9000 = 900 x 10 = 900 tens)
12. 6543
(Check by adding)
13. 2683
(highlight the word altogether. Especially those of you that wrote down 1448 as your answers.)
14. 5
(4 x 10 = 40, 8 x 5 = 40)
15. 8 (No reason to get this wrong.)
16. 294
(those of you that gave me answer as 6 please read the questions carefully! highlight the words '42 oranges in a carton'.)
17. 7890
(5 thousands 89 TENS = 5890.
_______ - 2000 = 5890)
18. 8475
(greatest - 5430, smallest - 3045. Check by subtracting)
19. 8278 - 2379 = 5899 write 7, 5 in the boxes.
(Add 5899 to 2379 to check.)
20. 49

Total up your marks for question 11 to 20. These ten questions are 2 marks each. Write your total marks for this section upon 20.

21. MODEL!! haiz, I have no idea how to draw models here! Can you teach me?
smaller number ----> 3944 - 370 = 3574
Sum ------> 3574 + 3944 = 7518
The sum of the 2 numbers is 7518.
( You will have to present these 2 steps to get the 4 marks.)

22. MODEL!!! Mary -----> 439 + 357 = 796
Susan -----> 796 + 698 = 1 494
Susan had 1494 coins.

23. Remember this question? It's the forth time you are seeing it! Drew your pictures??)
4 x 9 = 36 or 42 -9-9-9-9 = 6
42 -36 = 6

Each table weighs 6 kg.
(Each stool weighs 3kg so add up 5 tables and 4 chairs to check if you can get to 42kg. )

24. Model!!!!!!!!
Men -----> 2314 - 650 = 1664
Children -----> 1664 - 320 = 1344
There were 1344 children.
( You should get all 4 marks for this question if you drew the model and check by adding backwards to get back the answer for number of women.)

25. Draw 2 different models will be the best way. I will accept 1 model only if you can make it very very clear about the part he spent and his receiving from his father.)

4190 - 3455 = 735
735 + 1300 = 2035
He had $2035 at first.

Last section consists of 5 questions each carrying 4 marks. Wroking and word statement must be shown clearly to get all 4 marks. No units will minus half mark.

Ok, we have come to the end of PP 1. How did you do? All of you must leave me a comment with your FULL name to tell me your marks! 1 person only can leave 1 comment for this post. If your friends are checking answers with you cause they cannot come online? Can you leave a comment for them? Thanks 3B for the hard work! 5 more days to go!!! GO, GO, GO!!!!!

Love you! =)