7th Mathematics Monthly Test - 2(Number System)

MABS Institution

7th Mathematics Monthly Test - 2(Number System)-Aug 2020

Time : 2.00 Hours

Part - A

Generic 2 - Answer All Question

An elevator descends into a mine shaft at the rate of 5 m/min. If the descent starts from 15 m above the ground level, how long will it take to reach –250 m?

What will be the sign of the product of the following.
(i)16 times of negative integer.
(ii)29 times of negative integer

In a quiz competition, Team
A scored +30,–20, 0 and team B scored –20, 0, +30 in three successive rounds. Which team will win? Can we say that we can add integers in any order?

An atom can contain protons which have a positive charge (+) and electrons which have a negative charge (-). When an electron and a proton pair up, they become neutral (0) and cancel the charge out. Now, Determine the net charge
(i) 5 electrons and 3 protons \(\rightarrow \) -5+=-2 that is electrons u229du229d
(ii) 6 Protons and 6 electrons \(\rightarrow \)
(iii) 9 protons and 12 electrons \(\rightarrow \)
(iv) 4 protons and 8 electrons \(\rightarrow \)
(v) 7 protons and 6 electrons \(\rightarrow \)

What number should be added to (–17) to get (–19)?

One night in Kashmir, the temperature is -5^oC,Next day the temperature is 9^oC What is the increase in temperature?

In 8 hours duration, with uniform decrease in temperature, the temperature dropped 24°. How many degrees did the temperature drop each hour?

(-400) divided into 10 equal parts gives _____.

Check the following for equality and if they are equal, mention the property.
(i) (8-13)×7and 9-(13×7)
(ii) [(-6)-(+8)]×(−4) and (-6)-[8(−4)]
(iii)3×[(-4)+(-10)]and[3×(-4)+3×(-10)]

Scientists use the Kelvin Scale (K) as an alternative temperature scale to degrees Celsius (°C) by the relation TC=(T+273)K
(i) −°275C
(ii) 45°C
(iii) −400^oC
(iv) −273^oC

Are(11+7)+10 and 11+(7+10) equal? Mention the property.

Given 168×32=5376 then, find(−5376)÷(-32).

Find the product of
(i) (-35)×22 (ii) (-10)×12×(-9) (iii) (−9)×(−8)×(−7)×(-6)
(iv) (-25)×0×45×90 (v) (-2)×(+50)×(-25)×4

Add 2 to me. Then multiply by 5 and subtract 10 and divide now by 4 and I will give you 15! Who am I?

Kabilan was having 10 pencils with him. He gave 2 pencils to Senthil and 3 to Karthik. Next day his father gave him 6 more pencils, from that he gave 8 to his sister. How many pencils are left with him?

Part - B

Generic 3 - Answer All Question

Add the following integers using number line (i) 10 and –15 (ii) –7 and –9

In a competitive exam 4 marks are given for every correct answer and (-2) marks are given for every incorrect answer, kalaivizhi attended the exam and answered all the questions and scored 20 marks only even though she got 10 correct answers. How many questions did she answer incorrectly?

From the ground floor a man went up six floors and came down six floors. In which floor is he now?

Mention the property for the following equations:
(i) (-45) +(-12) =-57 (ii) (-15) +7=(7)+(-15)
(iii) −10+3=−7 (iv) (-7)+(-5)=(-5)+(-7)
(v) (-7) +[(-4) +(-3)]=[(-7)+(-4)]+(-3) (vi) 0+(-7245)=-7245

Add: (i) (–70) and (–12) (ii) 103 and 39.

Add (i) (–40) and (30) (ii) 60 and (–50)

A submarine is at 32 feet below the sea level. Then it moves up 8 feet. Find the depth of the submarine.

Sita saved ` 225.00 and she has spent ` 400 on credit basis for the purchase of stationery. Find her due amount.

(i) Are 120 + 51 and 51 + 120 equal?
(ii) Are(-5)+[(-4)+(-3)] and [(-5)+(-4)]+(-3)equal?

Find the missing integers (i) 0+(2345) = (ii) 23479+=0

Find the value of :
(i) (-35)\(\times \) (-11) (ii) 96\(\times \)(-20) (iii) (-5)\(\times \)12 (iv) 15\(\times \) 5 (v) 999\(\times \)0

A fruit seller sold 5kg of mangoes at a profit of ₹ 15 per kg and 3kg of apples at a loss of ₹ 30 per kg. Find whether it is a profit or loss.

Browsing rates in an internet centre is Rs 15 per hour. Nila works on the internet for 2 hours in a day for 5 days in a week. How much does she pay?

Divide: (i) (−85) by 5 (ii) (–250) by (–25) (iii) 120 by (–6) (iv) 182 by (–2)

A shopkeeper earns a profit of ₹ 5 by selling one notebook and incurs a loss of ₹ 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?

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7th Mathematics Monthly Test - 2(Number System)

MABS Institution

7th Mathematics Monthly Test - 2(Number System)-Aug 2020

Part - A

Generic 2 - Answer All Question

An elevator descends into a mine shaft at the rate of 5 m/min. If the descent starts from 15 m above the ground level, how long will it take to reach –250 m?

What will be the sign of the product of the following. (i)16 times of negative integer. (ii)29 times of negative integer

In a quiz competition, Team A scored +30,–20, 0 and team B scored –20, 0, +30 in three successive rounds. Which team will win? Can we say that we can add integers in any order?

What number should be added to (–17) to get (–19)?

One night in Kashmir, the temperature is -5oC,Next day the temperature is 9oC What is the increase in temperature?

In 8 hours duration, with uniform decrease in temperature, the temperature dropped 24°. How many degrees did the temperature drop each hour?

(-400) divided into 10 equal parts gives _____.

Check the following for equality and if they are equal, mention the property. (i) (8-13)×7and 9-(13×7) (ii) [(-6)-(+8)]×(−4) and (-6)-[8(−4)] (iii)3×[(-4)+(-10)]and[3×(-4)+3×(-10)]

Scientists use the Kelvin Scale (K) as an alternative temperature scale to degrees Celsius (°C) by the relation TC=(T+273)K (i) −°275C (ii) 45°C (iii) −400oC (iv) −273oC

Are(11+7)+10 and 11+(7+10) equal? Mention the property.

Given 168×32=5376 then, find(−5376)÷(-32).

Find the product of (i) (-35)×22 (ii) (-10)×12×(-9) (iii) (−9)×(−8)×(−7)×(-6) (iv) (-25)×0×45×90 (v) (-2)×(+50)×(-25)×4

Add 2 to me. Then multiply by 5 and subtract 10 and divide now by 4 and I will give you 15! Who am I?

Kabilan was having 10 pencils with him. He gave 2 pencils to Senthil and 3 to Karthik. Next day his father gave him 6 more pencils, from that he gave 8 to his sister. How many pencils are left with him?

Part - B

Generic 3 - Answer All Question

Add the following integers using number line (i) 10 and –15 (ii) –7 and –9

In a competitive exam 4 marks are given for every correct answer and (-2) marks are given for every incorrect answer, kalaivizhi attended the exam and answered all the questions and scored 20 marks only even though she got 10 correct answers. How many questions did she answer incorrectly?

From the ground floor a man went up six floors and came down six floors. In which floor is he now?

Mention the property for the following equations: (i) (-45) +(-12) =-57 (ii) (-15) +7=(7)+(-15) (iii) −10+3=−7 (iv) (-7)+(-5)=(-5)+(-7) (v) (-7) +[(-4) +(-3)]=[(-7)+(-4)]+(-3) (vi) 0+(-7245)=-7245

Add: (i) (–70) and (–12) (ii) 103 and 39.

Add (i) (–40) and (30) (ii) 60 and (–50)

A submarine is at 32 feet below the sea level. Then it moves up 8 feet. Find the depth of the submarine.

Sita saved ` 225.00 and she has spent ` 400 on credit basis for the purchase of stationery. Find her due amount.

(i) Are 120 + 51 and 51 + 120 equal? (ii) Are(-5)+[(-4)+(-3)] and [(-5)+(-4)]+(-3)equal?

Find the missing integers (i) 0+(2345) =______ (ii) 23479+______=0

Find the value of : (i) (-35)\(\times \) (-11) (ii) 96\(\times \)(-20) (iii) (-5)\(\times \)12 (iv) 15\(\times \) 5 (v) 999\(\times \)0

A fruit seller sold 5kg of mangoes at a profit of ₹ 15 per kg and 3kg of apples at a loss of ₹ 30 per kg. Find whether it is a profit or loss.

Browsing rates in an internet centre is Rs 15 per hour. Nila works on the internet for 2 hours in a day for 5 days in a week. How much does she pay?

Divide: (i) (−85) by 5 (ii) (–250) by (–25) (iii) 120 by (–6) (iv) 182 by (–2)

A shopkeeper earns a profit of ₹ 5 by selling one notebook and incurs a loss of ₹ 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?

Comment

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What will be the sign of the product of the following.
(i)16 times of negative integer.
(ii)29 times of negative integer

In a quiz competition, Team
A scored +30,–20, 0 and team B scored –20, 0, +30 in three successive rounds. Which team will win? Can we say that we can add integers in any order?

One night in Kashmir, the temperature is -5^oC,Next day the temperature is 9^oC What is the increase in temperature?

Check the following for equality and if they are equal, mention the property.
(i) (8-13)×7and 9-(13×7)
(ii) [(-6)-(+8)]×(−4) and (-6)-[8(−4)]
(iii)3×[(-4)+(-10)]and[3×(-4)+3×(-10)]

Scientists use the Kelvin Scale (K) as an alternative temperature scale to degrees Celsius (°C) by the relation TC=(T+273)K
(i) −°275C
(ii) 45°C
(iii) −400^oC
(iv) −273^oC

Find the product of
(i) (-35)×22 (ii) (-10)×12×(-9) (iii) (−9)×(−8)×(−7)×(-6)
(iv) (-25)×0×45×90 (v) (-2)×(+50)×(-25)×4

Mention the property for the following equations:
(i) (-45) +(-12) =-57 (ii) (-15) +7=(7)+(-15)
(iii) −10+3=−7 (iv) (-7)+(-5)=(-5)+(-7)
(v) (-7) +[(-4) +(-3)]=[(-7)+(-4)]+(-3) (vi) 0+(-7245)=-7245

(i) Are 120 + 51 and 51 + 120 equal?
(ii) Are(-5)+[(-4)+(-3)] and [(-5)+(-4)]+(-3)equal?

Find the missing integers (i) 0+(2345) = (ii) 23479+=0

Find the value of :
(i) (-35)\(\times \) (-11) (ii) 96\(\times \)(-20) (iii) (-5)\(\times \)12 (iv) 15\(\times \) 5 (v) 999\(\times \)0