6th Maths : Term 1 Unit 1 : Numbers : Text Book Back Exercises Questions with Answers, Solution

__Exercise
1.5__

** **

**1.
Fill in the blanks.**

**(i)
The difference between the smallest natural number and the smallest whole number
is __________. **

**(ii)
17 × __________ = 34 × 17 **

**(iii)
When __________ is added to a number, it remains the same. **

**(iv)
Division by __________ is not defined. **

**(v)
Multiplication by __________ leaves a number unchanged.**

** **

**2.
Say True or False.**

**(i)
0 is the identity for multiplication of whole numbers.**

**(ii)
Sum of two whole numbers is always less than their product.**

**(iii)
Both addition and multiplication are associative for whole numbers.**

**(iv)
Both addition and multiplication are commutative for whole numbers.**

**(v)
Multiplication is distributive over addition for whole numbers.**

** **

**3.
Name the property being illustrated in each of the cases given below.**

**(i)
75 + 34 = 34 + 75 **

**(ii)
(12 × 4) × 8 = 12 × (4 × 8) **

**(iii)
50 + 0 = 50 **

**(iv)
50 × 1 = 50 **

**(v)
50 × 42 = 50 × 40 + 50 × 2 **

** **

**4.
Use the properties of whole numbers and simplify.**

**(i)
50 × 102**

**(ii)
500 × 689 − 500 × 89**

**(iii)
4 × 132 × 25**

**(iv)
196 + 34 + 104**

**Solution:**

(i) 50 × 102

= (50 × 100) + (50 × 2)

= 5000 + 100 = 5100

(ii) 500 × 689 − 500 × 89

= 500 (689 − 89)

= 500 × 600

= 3,00,000

(iii) 4 × 132 × 25

= 132 × (25 × 4)

= 132 × 100 = 13,200

(iv) 196 + 34 + 104

= (196 + 4) + 100 + 34 ,

= 200 +100 + 34

= 334

** **

__Objective
Type Questions__

** **

**5.
(53 + 49) × 0 is**

**(a)
102**

**(b)
0 **

**(c)
1 **

**(d)
53 + 49 × 0**

**Answer:** (b) 0

** **

**6.
59/1 is**

**(a)
1**

**(b)
0**

**(c)
1/59 **

**(d)
59**

**Answer:** (d) 59

** **

**7.
The product of a non-zero whole number and its successor is always**

**(a)
an even number**

**(b)
an odd number **

**(c)
zero **

**(d)
none of these**

**Answer:** (a) an even number

** **

**8.
The whole number that does not have a predecessor is**

**(a)
10 **

**(b)
0 **

**(c)
1**

**(d)
none of these**

**Answer:** (b) 0

** **

**9.
Which of the following expressions is not zero?**

**(a)
0 × 0 **

**(b)
0 + 0**

**(c)
2 / 0**

**(d)
0 / 2**

**Answer:** (c) 2/0

** **

**10.
Which of the following is not true?**

**(a)
(4237 + 5498) + 3439 = 4237 + (5498 + 3439)**

**(b)
(4237 × 5498) × 3439= 4237 × (5498 × 3439)**

**(c)
4237 + 5498 × 3439 = (4237 + 5498) × 3439**

**(d)
4237 × (5498 + 3439) = (4237 × 5498) + (4237 × 3439)**

**Answer:** (c) 4237 + 5498 × 3439 = (4237 + 5498) × 3439

** **

__Answers:__

__Exercise 1.5__

**1) (i) 1 (ii) 34 (iii) 0 (iv) Zero (v) one**

**2) (i) False (ii) False (iii) True (iv) True (v) True**

**3) (i) Commutativity for Addition (ii) Associativity for
Multiplication (iii) Zero is Additive Identity (iv) One is Multiplicative
Identity (v) Distributivity of Multiplication over Addition **

**4) (i) 5100 (ii) 3,00,000 (iii) 13,200 (iv) 334 **

**5) (b) 0**

**6) (d) 59**

**7) (a) an even number**

**8) (b) 0**

**9) (c) 2/0**

**10) (c) 4237+ 5498 × 3439 = (4237 + 5498) × 3439**

Tags : Questions with Answers, Solution | Numbers | Term 1 Chapter 1 | 6th Maths , 6th Maths : Term 1 Unit 1 : Numbers

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6th Maths : Term 1 Unit 1 : Numbers : Exercise 1.5 | Questions with Answers, Solution | Numbers | Term 1 Chapter 1 | 6th Maths

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