Haryana State Board HBSE 6th Class Maths Solutions Chapter 6 पूर्णांक Ex 6.3 Textbook Exercise Questions and Answers.
Haryana Board 6th Class Maths Solutions Chapter 6 पूर्णांक Exercise 6.3
प्रश्न 1.
घटाइए:
(a) 35 – (20)
(b) 72 – (90)
(c) (-15) – (-18)
(d) (-20) – (13)
(e) 23 – (-12)
(f) (-32) – (-40)
हल :
(a) 35 – (20) = (15 + 20) – 20
= 15 + (20 – 20)
= 15 + 0 = 15 उत्तर
(b) 72 – 90 = 72 – (72 + 18)
= (72 – 72) – (18)
= 0 – (18)
= – 18. उत्तर
(c) (-15) – (-18) = – 15 + 18
= – 15 + (15 + 3)
= (- 15 + 15) + 3
= 0 + 3 = + 3 उत्तर
(d) (-20) – 13 = – 20 – 13
= – (20 + 13)
= – 33 उत्तर
(e) 23 – (-12) = 23 + 12 = 35 उत्तर
(f) (-32) – (-40) = – 32 + 40
= (-32 + 32) + 8= 0 +8 = 8 उत्तर
प्रश्न 2.
रिक्त स्थानों को >,< या = से भरिए:
(a) (-3) + (-6)………. (-3) – (-6)
(b) (-21) – (-10)……….. (-31) + (-11)
(c) 45 – (-11)…………57 + (-4)
(d) (-25) – (-42)…………. (-42) – (-25)
हल :
(a) (-3) + (-6) = – 3 – 6 = – 9
और (-3) – (-6) = -3 + 6 = 3
∴ -9 < 3
अतः (-3) + (-6) < (-3) – (-6) उत्तर
(b) (-21) – (-10) = – 21 +10 = – 11 (- 31) + (-11)= -31 – 11 = – 42 ∴ -11 > -42
अतः (-21) – (-10) > (-31) + (-11) उत्तर
(c) 45 – (-11) = 45 + 11 = 56 और
57 + (-4) = 57 – 4 = 53
∴ 56 > 53
अत: 45 – (-11) > 57 + (-4) उत्तर
(d) (-25) – (-42) = – 25 + 42
= – 25 + (25 + 17)
= (-25) + (+25) + 17
= 0 + 17 = 17
और (-42) – (-25) = – 42 + 25
= (-17 – 25) + 25
= -17+ (-25) + (+25)
= -17 + 0 = – 17
∴ 17 > – 17
अतः (-25) – (-42) > (-42) – (-25) उत्तर
प्रश्न 3.
रिक्त स्थानों को भरिए :
(a) (-8) + …….. = 0
(b) 13 + ……… = 0
(c) 12 + (-12) = …….
(d) (-4)+ …….. = – 12
(e) …….. – 15 = – 10
हल :
(a) (-8) + (+8) = 0
(b) 13 + (-13) = 0
(c) 12 + (-12) = 0
(d) (-4) + (-8) = – 12, [∵ – 12 – (-4) = – 12 + 4 = – 8]
(e) 5 – 15 = – 10 (∵ 10 + 15 = 5)
प्रश्न 4.
निम्नलिखित के मान ज्ञात कीजिए:
(a) (-7) – 8 – (-25)
(b) (-13) + 32 – 8 – 1
(c) (-7) + (-8) + (-90)
(d) 50 – (-40) – (-2)
हल :
(a) (-7) – 8 – (-25) = – 7 – 8 + 25 = – 15 + 25 = 10 उत्तर
(b) (-13) + 32 – 8 – 12 – 13 – 8 – 1 + 32
= – 22 + 32 = 10 उत्तर
(c) (-7) + (-8) + (-90)
= – 7 – 8 – 90 = – 105 उत्तर
(d) 50 – (-40) – (-2) = 50 + 40 + 2 = 92 उत्तर