Somerville School, Noida Mathematics Worksheet – 3 (2020-2021) Class-3 Reading numbers beyond 999 We already know about places ones, tens and hundreds. They belong to the period ONES. Places beyond hundreds are thousands and ten thousands .They belong to the period THOUSANDS PERIODS THOUSANDS ONES TEN PLACES THOUSANDS THOUSANDS HUNDREDS TENS We use a comma to separate the ones period from the thousands period eg. Th H T O NUMBER 2 1 4 5 2,145 ONES NUMBER NAME Two thousand one hundred forty five REMEMBER- We do not write and in number names. Ex.1 Write the number names of the followinga) 1,472 = ____________________________________________________________________ b) 4,690 = ____________________________________________________________________ c) 9,167 = ____________________________________________________________________ d) 7,354 = ____________________________________________________________________ e) 5,703 = ____________________________________________________________________ Ex.2 Write the numerals for the followingS.No a) b) c) d) e) f) Number Name Six thousand thirty nine Two thousand three hundred eighty seven Nine thousand ninety one One thousand three hundred four Five thousand nine Four thousand seven hundred ten Numeral 6039 Place Value and Face Value Each digit of a number has a place value and a face value. The place value of a digit depends on its place in the number . It can be obtained by multiplying the digit with its place. The face value of a digit is simply the value of the digit irrespective of its position in the number.eg. Th H T O 5 8 7 4 Face Value Place Value 4 4X1=4 7 7 X 10=70 8 8 X 100=800 5 5X 1000= 5000 Ex.1 Write the face value, place and place value of the underlined digits – Number Face Value Place Place Value a) 4637 6 hundreds 600 b) 8794 c) 6045 d) 9308 e) 7689 Expanded and Short Form of a Number The expanded form of a number helps us to understand the value of each digit in the given number. It can be written in words as well as in numbers. Let us take a few examples 1) 5437 can be written as Th H 5 4 T 3 O 7 = 5000 + 400 + 30 + 7 (In numbers) = 5 thousands + 4 hundreds + 3 tens + 7 ones (In words) 2) 9 1 3 5 Th H 9 1 T 3 O 5 = 9000 + 100 + 30 + 5 = 9 thousands + 1 hundred (not hundreds) + 3 tens + 5 ones 3) 7 0 2 3 Th H 7 0 T 2 O 3 = 7000 + 20 + 3 = 7 thousands + 2 tens + 3 Ones Please note if the place value is 0 then it is not written in the expanded form . Ex.1 Write the numbers in expanded form (both in numbers and in words) .The first one has been done for you – a) 9 8 8 3 = 9000 + 800 + 80 + 3 9 8 8 3 = 9 thousands + 8 hundreds + 8 tens + 3 ones b) 6792= c) 2705= d) 8064 = e) 139 6= Short Form Let us now understand writing numbers in the short form with the help of some examplesa. 3000 + 800 + 70 + 4 = 3874 b. 6000 + 40 + 9 = 6049 (There is no number at the hundreds place so we put a 0 there ) c. 7000 + 3 = 7003 Ex.2 Write in short form – a) b) c) d) e) 9000 + 500 + 30 + 6 = 1000 + 900 + 40 + 7 = 6000 + 800 + 1 = 3000 + 100 + 10 + 3 = 2000 + 20 + 2 =