Math Ch-1 Large Numbers(Summary of topic taught)
Date: 06/04/20
Topic taught: 6-digit numbers: Number names,Expanded Form and place value.
1. Watch Video 1 based on 6-digit numbers.
2. Solve WS1 for more practice.
3. Solve Ex. 1.1 on page no. 2 of the textbook in your rough notebooks.
For Keypoint refer the ppt attached below:
Lets revise 6-digit numbers
Date: 07/04/20
Topic Taught: 7 and 8-digit numbers
Writing and reading 7 and 8 digit numbers using Indian Numeration system and International numeration system .
Inserting commas according to Indian and International numeration system.
1. Watch PPT slide 2-9 for 7 and 8-digit numbers.
2. Watch Video 2-3 based on reading and writing 7 digit numbers, standard form of 7-digit number
3. Comparison of Indian and International system of Numeration.
4. Solve WS2 for more practice.
5. Solve Ex. 1.2 on page no. 6 of the textbook in your notebooks.
Date: 08/04/20
Topic Taught: Place value, Expanded form, standard form, Predecessor and successor.
1. Watch video 4-7 for understanding place value of a number, expanded form of a number,
standard form of a number & successor and predecessor of 8-digit number.
2. Also check the PPT Slide no. 10-11 for more support to understand the above concepts.
3. Solve WS3 for more practice.
4. Solve Ex. 1.3 on page no. 8 of the textbook in your notebooks.
Key points for 07/04/20 and 08/04/20 :
7-8 digit numbers
Date: 09/04/20
Topic Taught: Comparing and ordering of large numbers.
1. Watch video 8-9 for understanding comparing numbers of 8-digit number, ascending and
descending order, formation of the greatest and the smallest numbers.
2. Also check the PPT Slide no. 12-14 for more support to understand the above concepts.
3. Solve WS4 for more practice.
4.Solve Ex. 1.4 on page no. 10-11 of the textbook in your notebooks.
For Keypoint refer the ppt attached below:
Ordering, Comparing and forming large numbers
Date:13/04/20
Topic Taught: Rounding off Numbers to nearest 10,100,1000
1. Watch video 10 for understanding rounding off the numbers to the nearest 10,100 and 1000.
2. Solve WS5 for more practice.
3. Solve Ex. 1.5 on page no. 12 of the textbook in your rough notebooks.
For Keypoint refer the ppt attached below:
Rounding off numbers
Date:14/04/20
Topic Taught: Roman Numerals
1. Watch video 11 for understanding roman numerals.
2. Solve WS6 for more practice.
3. Solve Ex. 1.6 on page no. 13of the textbook in your notebooks.
Solve the questions given in chapter 1 of workbook and revision exercise of the large numbers.
(Note: The PDF file named ‘RWS_CBSE_V_Math_Large Numbers’ attached in this chapter is for
solving worksheet and ‘RWS_AS_CBSE_V_Math_ Large Numbers’ is its answer key.)
Key points:
1.In Roman numeral system, seven letters of the English alphabet are used to represent
numbers.
2. In Roman numeral system there is no symbol for zero and no place value system.
Rules for writing Roman numerals.
3.The seven basic symbols used in Roman numerals are as follows: I-1, V-5 , X-10 , L-50 , C-100, D-500, M- 1000.
4. Rules for writing roman numerals:
a. Repetition of a symbol means addition. A symbol can be repeated for a maximum
of three times to represent a number. The symbols V, L and D are never repeated.
For example,
(i) XXX = 10 + 10 + 10 = 30 (ii) CC = 100 + 100 = 200
b.When a smaller numeral is written to the right of a larger numeral, then the smaller
numeral is added to the larger one.
For example,
(i) XI = 10 + 1 = 11 (ii) LV = 50 + 5 = 55 (iii) LX = 50 + 10 = 60
c. When a smaller numeral is written to the left of a larger numeral, the smaller
numeral is always subtracted from the larger one. The symbols V, L and D are
never subtracted. Also, I is never written to the left of L, C and D.
For example,
(i) IX = 10 – 1 = 9 (ii) XL = 50 – 10 = 4 (iii) XC = 100 – 10 = 90
Note: All the videos ,ppt and worksheets mentioned in SSD are in students resources on betweenus portal.
For textual content please click on the link attached below :
Ch-1 Large Numbers
Topic taught: 6-digit numbers: Number names,Expanded Form and place value.
1. Watch Video 1 based on 6-digit numbers.
2. Solve WS1 for more practice.
3. Solve Ex. 1.1 on page no. 2 of the textbook in your rough notebooks.
For Keypoint refer the ppt attached below:
Lets revise 6-digit numbers
Date: 07/04/20
Topic Taught: 7 and 8-digit numbers
Writing and reading 7 and 8 digit numbers using Indian Numeration system and International numeration system .
Inserting commas according to Indian and International numeration system.
1. Watch PPT slide 2-9 for 7 and 8-digit numbers.
2. Watch Video 2-3 based on reading and writing 7 digit numbers, standard form of 7-digit number
3. Comparison of Indian and International system of Numeration.
4. Solve WS2 for more practice.
5. Solve Ex. 1.2 on page no. 6 of the textbook in your notebooks.
Date: 08/04/20
Topic Taught: Place value, Expanded form, standard form, Predecessor and successor.
1. Watch video 4-7 for understanding place value of a number, expanded form of a number,
standard form of a number & successor and predecessor of 8-digit number.
2. Also check the PPT Slide no. 10-11 for more support to understand the above concepts.
3. Solve WS3 for more practice.
4. Solve Ex. 1.3 on page no. 8 of the textbook in your notebooks.
Key points for 07/04/20 and 08/04/20 :
7-8 digit numbers
Date: 09/04/20
Topic Taught: Comparing and ordering of large numbers.
1. Watch video 8-9 for understanding comparing numbers of 8-digit number, ascending and
descending order, formation of the greatest and the smallest numbers.
2. Also check the PPT Slide no. 12-14 for more support to understand the above concepts.
3. Solve WS4 for more practice.
4.Solve Ex. 1.4 on page no. 10-11 of the textbook in your notebooks.
For Keypoint refer the ppt attached below:
Ordering, Comparing and forming large numbers
Date:13/04/20
Topic Taught: Rounding off Numbers to nearest 10,100,1000
1. Watch video 10 for understanding rounding off the numbers to the nearest 10,100 and 1000.
2. Solve WS5 for more practice.
3. Solve Ex. 1.5 on page no. 12 of the textbook in your rough notebooks.
For Keypoint refer the ppt attached below:
Rounding off numbers
Date:14/04/20
Topic Taught: Roman Numerals
1. Watch video 11 for understanding roman numerals.
2. Solve WS6 for more practice.
3. Solve Ex. 1.6 on page no. 13of the textbook in your notebooks.
Solve the questions given in chapter 1 of workbook and revision exercise of the large numbers.
(Note: The PDF file named ‘RWS_CBSE_V_Math_Large Numbers’ attached in this chapter is for
solving worksheet and ‘RWS_AS_CBSE_V_Math_ Large Numbers’ is its answer key.)
Key points:
1.In Roman numeral system, seven letters of the English alphabet are used to represent
numbers.
2. In Roman numeral system there is no symbol for zero and no place value system.
Rules for writing Roman numerals.
3.The seven basic symbols used in Roman numerals are as follows: I-1, V-5 , X-10 , L-50 , C-100, D-500, M- 1000.
4. Rules for writing roman numerals:
a. Repetition of a symbol means addition. A symbol can be repeated for a maximum
of three times to represent a number. The symbols V, L and D are never repeated.
For example,
(i) XXX = 10 + 10 + 10 = 30 (ii) CC = 100 + 100 = 200
b.When a smaller numeral is written to the right of a larger numeral, then the smaller
numeral is added to the larger one.
For example,
(i) XI = 10 + 1 = 11 (ii) LV = 50 + 5 = 55 (iii) LX = 50 + 10 = 60
c. When a smaller numeral is written to the left of a larger numeral, the smaller
numeral is always subtracted from the larger one. The symbols V, L and D are
never subtracted. Also, I is never written to the left of L, C and D.
For example,
(i) IX = 10 – 1 = 9 (ii) XL = 50 – 10 = 4 (iii) XC = 100 – 10 = 90
Note: All the videos ,ppt and worksheets mentioned in SSD are in students resources on betweenus portal.
For textual content please click on the link attached below :
Ch-1 Large Numbers
