LESSON THREE: 10 FEBRUARY 2021
LESSON THREE: TOPIC ONE:NUMBERS AND CALCULATIONS WITH NUMBERS
SECTION ONE: FORMATS AND CONVENTIONS
10 FEBRUARY 2021
GOOD DAY ALL, I TRUST YOU ARE WELL!
Yesterday’s answers.
Activity 1: Different number formats
1. The numbers below are printed in a American magazine. Write them using our South African conventions:
a) $1678,75
b) $3 988 620,12
c) 42 000 199
d) 62,178 g
2. Write these numbers with spaces to group them correctly:
a) 53 211
b) 167 890
c) 90 001
d) 1 123 456
e) 4 879 120
3. Write today’s date in two different formats.
09/02/2021 (9th February 2021) or 02/09/2021 (February 09th 2021)
4. Write out each number in words:
a) 12 341 - Twelve thousand, three hundred and forty-one.
b) 202 082 003 - Two hundred and two million, eighty-two thousand and three.
c) 1 000 010 - One million and ten.
5. Write the following words as numbers:
a) Four hundred and sixty thousand, five-hundred and forty-two.
a) 460 542
b) Fourteen million, sixteen thousand and seven.
b) 14 160 007
c) Three billion, eight-hundred and three thousand.
c) 3 000 803 000
6. Write the following numbers in order from biggest to smallest (DESCENDING ORDER): (hint: for each question below draw the table for place value as I did in the example.)
a) 161 280; 600 765; 1 653 232; 1 694 212; 612 005
a) 1 694 212; 1 653 232; 612 005; 600 765; 161 280
b) 888 024; 188 765; 1 808 765; 818 123; 82 364
b) 1 808 765; 888 024; 818 123; 188 765; 82 364
c) 315 672; 333 289; 3 233 987; 3 402 987; 3 325 999
c) 3 402 987; 3 325 999; 3 233 987; 333 289; 315 672
Please mark and correct your work before moving on to today’s work!
TODAY WE SHALL TALK ABOUT POSITIVE AND NEGATIVE NUMERS AND TIME FORMATS.
Remember, we refer to positive and negative numbers as integers. Attached is a file called notes. There are a few instances where we use these numbers in real life contexts. have a look through these. When you return to school, we will have them handed out to you so that you may stick them into your book.
TIME FORMATS
These are found in the file called notes are methods of how one goes about converting between time formats. These are extremely helpful when looking at time in context. Remember that in Mathematical Literacy, all we do is to look at numbers as they relate to real world situations. Hence it is important to see the numbers as having meanings rather than just 2 + 2 = 4. So, in Math Lit we say perhaps 2 days + 5 days = 7 days which is also 1 week.
These notes in the attachment show you the various ways to convert. Remember that these methods are ultimately the same, choose the one you are most comfortable with.
WHAT YOU HAD TO DO:
The exercises are attached in the file called exercises.
IN YOUR BOOK:
Write today’s date (10 Feb 2021)
(There are two exercises. Please name them accordingly in your books)
WHAT TO EXPECT:
Tomorrow we begin with more work. WORKING WITH A CALCULATOR TO SOLVE BASIC MATHS CALCULATIONS
__________________________________________________________________________END!!!
LESSON BY H. MAHARAJ (hmaharaj@alexhigh.org.za)