Text Book Back Exercises Questions with Answers, Solution : 5th Maths : Term 3 Unit 2 : Numbers : Exercise 2.1 (Estimation)

**Exercise 2.1**

** **

**1. Fill in the blanks**

(i)
Estimation of 27 to its nearest Tens place is __30__

(ii)
Estimation of 65 to its nearest Tens place is __70__

(iii)
The cost of 1kg pomegranate is ₹ 93. Then the estimated cost is __₹ 90__

(iv)
Estimation of 76 bananas to its nearest Tens place is __80__

** **

**2. There are 27 girls
and 38 boys in a class. Find the sum and estimate the sum to its nearest Tens
place**.

Number of girls = 27

Number of boys = 38

27 + 38 = **65**

Actual sum = 65

Estimate sum = 70

**Answer: Estimate
sum = 70**

**3. If the cost of a
geometry box is ₹ 53 and the cost of a note book is ₹ 36, then estimate their
cost to its nearest Tens place and find the sum. Also, find the difference
between the estimated value and the actual value.**

**Difference
between estimated value and actual value = 90− 89 = ₹1**

** **

**4. If Kavitha has 93
pictures and she gave 42 pictures to her friend Neela, then estimate the
picutres to its nearest Tens place and find their difference. Also, find the
difference between actual value and the estimated value.**

**Difference
between actual value and estimated value = 51− 50 = 1 **

** **

**5. The cost of a pen is
₹ 32. Find the cost of 6 pens and estimate it to its nearest Tens place.**

Cost of a pen =
₹ 32

Cost of 6 pens = 32 ×2 = ₹192

Actual cost = ₹192

**Estimated
cost = ₹190**

** **

**6. Arun has ₹47, Raja
has ₹ 54. Find the sum and estimate it to its nearest Hundreds place.**

Anin has = ₹47

Raja has = ₹54

Sum =
₹101

**Estimated
amount to its nearest hundreds place = ₹100**

** **

**7. There are 21
chocolate bars in a packet. Find the number of chocolate bars in 9 such packets
and estimate it to its nearest Hundreds place.**

Number of chocolate bars in a packet = 21

Number of chocolate bars in 9 packets = 21×9

= 189

Actual Number of chocolate = 189

**Estimated
number of chocolate to its nearest hundreds place = 200**

**8. 132 peanut candies
are shared equally with 12 students. Find the share for one student and
estimate it to its nearest Tens place.**

Total number of peanut = 132

Total number of students = 12

Share for one student . = 132 ÷ 12

= 11

Actual number of peanut = 11

**Estimated
number of peanut = 10**

__Answer:__

**Exercise 2.1 **

**1. (i) 30 (ii) 70 (iii) 90 (iv) 80**

**2. 70 **

**3. 90; 1 **

**4. 50;1 **

**5. 160 **

**6. 100 **

**7. 190 **

**8. 11;10**

Tags : Numbers | Term 3 Chapter 2 | 5th Maths , 5th Maths : Term 3 Unit 2 : Numbers

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5th Maths : Term 3 Unit 2 : Numbers : Exercise 2.1 (Estimation) | Numbers | Term 3 Chapter 2 | 5th Maths

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