Whole numbers up Unit 2.1 to 999 999


Mental Maths


1 Count forwards and backwards between 0 and 10 000 in: a 2s from any even number c 3s from any number e 10s from any number g 50s from any number


b 2s from any odd number d 5s from any number f 25s from any number h 100s from any number


2 Write the following 5-digit numbers in ascending and descending order: 89 671; 87 692; 86 793; 89 764; 87 965; 86 976


Read, write and represent 5-digit whole numbers


In Grade 4 you worked with up to 4-digit whole numbers, which means all numbers to the left of point B on number line AB.


Number line AB is only a small part of number line AM below. 0


A B C D E F G H K L M 10 000 20 000 30 000 40 000 50 000 60 000 70 000 80 000 90 000 100 000


When you work with 5-digit whole numbers, you work with all numbers to the left of M, which is ten times more numbers than on line AB.


Let’s do an example


We can find the following numbers on the number line: 15 000 lies between B and C; 32 500 lies between D and E; 65 730 lies between G and H; 96 857 lies between L and M


We can write these numbers in words: 15 000: fifteen thousand


32 500: thirty-two thousand five hundred 65 730: sixty-five thousand seven hundred and thirty 96 857: ninety-six thousand eight hundred and fifty-seven


90 Term 2


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