7th Standard Syllabus & Materials
7th Standard
TN 7th Tamil பருவம் -1 இயல் 1 - அமுதத்தமிழ் - ஒன்றல்ல இரண்டல்ல Important Questions And Answers Study Material - QB365 Set A
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TN 7th Tamil பருவம் -1 இயல் 1 - அமுதத்தமிழ் - எங்கள் தமிழ் Important Questions And Answers Study Material - QB365 Set A
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Published on: 29/06/2019
New syllabus model question paper for seventh standard maths chapter one
Download Tamil Nadu 7th Standard Maths question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Maths Test1.
Are (–81) x [5 x (–2)] and [(–81) x 5] x (–2) equal? Mention the property.
2.
Are (–42) x (–7) and (–7) x (–42) equal? Mention the property.
3.
Find the missing integers
(i) 0 + (2345) =______
(ii) 23479 + ______= 0
4.
Add
(i) (–40) and (30)
(ii) 60 and (–50)
5.
-70 + 20 = ?-10
6.
Kamatchi, a fruit vendor sells 30 apples and 50 pomegranates. If she makes a profit of Rs.8 per apple and loss Rs. 5 per pomegranate, what will be her overall profit(or)loss?
7.
If the letters in the English alphabets A to M represent the number from 1 to 13 respectively and N represents 0 and the letters O to Z correspond from –1 to−12, find the sum of integers for the names given below.
For example,
MATH \(\rightarrow\) sum\(\rightarrow\)13 + 1 + 6 + 8 = 16
(i) YOUR NAME
(ii) SUCCESS
8.
Given 168 x 32 = 5376 then, find (−5376) ÷ (-32).
9.
Are (11 + 7) + 10 and 11 + (7 + 10) equal? Mention the property.
10.
(-2) x −(-9) =_____
108
-108
+1
-1
11.
Which of the following expressions is equal to –30.
–20 – (–5 x 2)
(6 x 10) – (6 x 5)
(2 x 5) + (4 x 5)
(–6) x (+5)
12.
(-8) + 10 + (-2) = ____
2
8
0
20
13.
Identify the problem with negative numbers as its answer:
-9 + (-5) + 6
8 + (-12) - 6
-4 + 2 + 10
10 + 9 (-4) + 8
14.
The temperature at 12 noon at a certain place was 18° above zero. If it decreases at the rate of 3° per hour at what time it would be 12° below zero?
12 mid night
12 noon
10 am
10 pm
15.
The smallest negative integer is −1.
16.
(−30) ÷ (−6) = −6
17.
(-15) x 5 = 75
18.
(-45) - (-8) = (-8) - (-45)
19.
15 - (-18) is the same as 15 + 18
20.
(-62) ÷ (-62) = ___
21.
(-42) + [____ + (-23)] = [___ + 15] + ____
22.
____ + (-22) = 0
23.
(-52) + (-52) = ____
24.
(100) \(\times \) ______= -500
25.
Ferozkhan collects Rs.1150 at the rate of Rs.25 per head from his classmates on account of the 'Flag Day' in his school and returns Rs.8 to each one of them, as instructed by his teacher. Find the amount handed over by him to his teacher.
26.
A shopkeeper earns a profit of Rs. 5 by selling one notebook and incurs a loss of Rs. 2 per pen while selling of his old stock. In a particular day he earns neither profit nor loss. If he sold 20 notebooks, how many pens did he sell?
27.
1 x (-1098) = (–1098) = (–1098) x 1
28.
For any two integers (−5) and 10
(−5) x 10 = 10 x (−5)
29.
0 + (−138) = (−138) = (−138)+0
30.
For any three integers 68, 25 and 99
68 x( 25 + 99) = ( 68 x 25 ) + ( 68 x 9)
31.
For any two integers 72 and 108, 72 +108 is an also an integer
1.
Consider, (–81) x [5 x (–2)],(–81) x [5 x (–2)] = (–81) x (–10) = 810
Consider, [(–81) x [5 x (–2),[(–81) x 5] x (–2) = (–405) x (–2) = 810
Therefore, (–81) x [5 x (–2)] and [(–81) x 5] x (–2) are equal.
It is associative.
2.
Consider, (–42) x (–7), (–42) x (–7) = +294
Consider, (–7) x (–42), (–7) x (–42) = +294
Therefore, (–42) x (–7) and (–7) x (–42) are equal.
It is commutative.
3.
(i) 0 + (-2345) = -2345
(ii) 23479 + (-23479) = 0
Therefore, additive inverse of 23479 is –23479
4.
(i) (–40) and (30)
–40 + 30 = –10
(ii) 60 and (–50)
60 + (–50) = 60 – 50 = 10
5.
-70 + 20 = x - 10
-50 = x - 10
x = -50 + 10 = -40
= -40
6.
Profit for 1 apple = Rs. 8
Profit for 30 apples = 30 x Rs. 8 = Rs. 240
Loss for 1 pomegranate = - Rs. 5
Loss for 50 pomegranates = 50 x -5 = - Rs. 250
Her overall loss will be = - Rs. 250 + Rs. 240
= Rs.- 10
Loss = Rs.10
7.
| A | B | C | D | E | F | G | H | I | J | K | L | M |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 1 | 12 | 13 |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
| 0 | -1 | -2 | -3 | -4 | -5 | -6 | -7 | -8 | -9 | -10 | -11 | -12 |
(i) YOUR NAME
= (-11) + (-1) + (-7) + (-4) + 0 + 1 + 13 +5
= -23 + 19 = -4
(ii) SUCCESS
= (-5) + (-7) + 3 + 3 + 5 + (-5) + (-5)
= -12 + 11 + (-10)
= -11
8.
Given 168 x 32 = 5376
\(\frac{-5376}{-32}=\frac{-(168 \times 32)}{-32}=168\)
9.
(11 + 7) + 10 = 18 + 10 = 28
11 + (7 + 10) = 11 + 17 = 28
Yes, (11 + 7) + 10 and 11 + (7 + 10) are equal.
This is Associative property. a+ (b + c) = (a + b) + c.
10.
(a)
108
11.
(d)
(–6) x (+5)
12.
(c)
0
13.
(a)
-9 + (-5) + 6
14.
(d)
10 pm
15.
(b)
16.
(b)
17.
(b)
18.
(b)
19.
(a)
20.
( )
1
21.
( )
15,-42,-23
22.
( )
22
23.
( )
-104
24.
( )
-5
25.
Ferozkhan collects Rs.1150 at the rate of Rs.25 per head from his classmates on account of the 'Flag Day'
Total amount collected = Rs.1150
Amount per head = Rs.25
Number of students = 1150 ÷ 25 = 46
Amount returned to each student is Rs.8
Amount returned to 46 students = 46 x 8 = Rs.368
Amount handed over to the class teacher = Rs.1150
26.
Since neither profit nor loss
Profit + Loss = 0
(ie) profit = -Loss
Profit earned from 1 notebook = Rs. 5
Profit earned from 20 notebooks = 20 x Rs. 5
= Rs. 100
Loss incurred by selling pens = Rs. 100 Loss
= −100
Loss for 1 pen = Rs. 2
loss = −2
Total number of pens sold = (−100) ÷ (−2)
= 50 pens.
27.
Multiplicative identity
28.
Commutative property under multiplication.
29.
Additive identity
30.
Distributive property of multiplication over addition
31.
Closed under addition
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Tamilnadu Stateboard 7th Standard Subjects
Tamilnadu Stateboard Standards
