TN 7th Maths | Exercise 1.4 Full | Term 1 | Number System | AlexMaths | TamilNadu

#tnnewsyllabus Join this channel to get access to perks:    / @alexmaths   #7thmathsterm1 #7thmaths 1. Fill in the blanks. (i) (−40)÷ ___ = 40 (ii) 25 ÷ ___ = −5 (iii) ___÷(−4) = 9 (iv) (−62)÷(−62) = ___ 2. Say true or false. (i) (−30)÷(−6) = −6 (ii) (−64)÷(−64)is 0 3. Find the values of the following. (i) (−75)÷ 5 (ii) (−100)÷(−20) (iii) 45 ÷(−9) (iv) (−82)÷ 82 4. The product of two integers is −135. If one number is −15, Find the other integer. 5. In 8 hours duration, with uniform decrease in temperature, the temperature dropped 24°. How many degrees did the temperature drop each hour? 6. 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? 7. A person lost 4800 calories in 30 days. If the calory loss is uniform, calculate the loss of calory per day. 8. Given 168 × 32 = 5376 then, find (−5376)÷ (−32) . 9. How many(−􀀀) ’s are there in (−20) ? 10. (−400)divided into 10 equal parts gives _____. Objective type questions 11. Which of the following does not represent an Integer? (i) 0 ÷(−7) (ii) 20 ÷(−4) (iii) (−9)÷ 3 (iv) (12)÷ 5 12. (−16)÷ 4 is the same as (i) −(−16 ÷ 4) (ii) −(16)÷(−4) (iii) 16 ÷(−4) (iv) −4 ÷16 13. (−200)÷10 is (i) 20 (ii) −20 (iii) −190 (iv) 210 14. The set of integers is not closed under (i) Addition (ii) Subtraction (iii) Multiplication (iv) Division