Answer:

The smallest pencil that I had used was about 1 cm long.

I think the given pencil is more than 3 cm.

With the help of scale, the length of the pencil comes out to be 3.6 cm.

So, my guess was correct.

Disclaimer: The length of the smallest pencil that you have used varies from student to student. The answers provided here are for reference only.

Answer:

We know that, 1 cm = 10 mm So, 0.9 cm = 9 mm 0.9 cm means 9 mm

It is the same as 9 millimetres.

So 30.5 cm is the same as 30 cm and 5 millimetre.

Now, 30.5 cm = 30 cm and 5 mm

We know that, 1 m = 100 cm

Length of the biggest frog = 30.5 cm Thus, a maximum of 3 big frogs can fit on 1m scale.

Length of each small frog = 0.9 cm Thus, a maximum of 111 small frogs can sit in a straight line and cover 1 m.

Answer:

(1) Length of nail = 2 cm 9 mm Now, 10 mm = 1 cm

1 mm =

110cm

9 mm = 0.9 cm

So, 2 cm 9 mm = 2.9 cm

(2) Length of lady finger is 8 cm and 4 mm Now, 10 mm = 1 cm

1 mm =

110cm

4 mm = 0.4 cm

So, 8 cm 4 mm = 8.4 cm

(3)

Answer:

Disclaimer: Students are advised to prepare the answer on their own.

Answer:

I think line B is longer than line A. With the help of ruler, we get the measurement of line A as 4.6 cm and line B as 4.6 cm. That means, both the lines are of same length. So, our guess was incorrect.

I think both the lines C and D are of same measurement. With the help of ruler, we get the measurement as 3.2 cm for both the lines. So, our guess was correct.

Disclaimer: The guess may vary from student to student. The answers provided here are for reference only.

Answer:

My guess: Length of notebook = 25 cm Breadth of notebook = 20 cm

Measure: Length of notebook = 22.3 cm Breadth of notebook = 18.3 cm

Difference in length between my guess and measure = 25 − 22.3 = 2.7 cm

Difference in breadth between my guess and measure = 20 − 18.3 = 1.7 cm

Answer:

We know that, Re 1 = 100 paise

(1) Cost of a matchbox = Re 0.50 = 50 paise

(2) Cost of a matchbox = Rs 50 paise Amount of money to buy matchboxes = Rs 2.50 = 2 rupees 50 paise = 2 × 100 paise + 50 paise = 200 paise + 50 paise = 250 paise

So, number of matchboxes bought for Rs 2.50 = 250 ÷ 50 = 5 Thus, 5 matchboxes can be bought for Rs 2.50.

(3) Cost of a soap = Rs 8.75

(4) We know that, Re 1 = 100 paise Arun has a five-rupee coin, 2 one-rupee coins and 4 half-rupee coins. Now, Rs 5 = 5 × 100 paise = 500 paise

2 one rupee coins = 2 × 100 paise = 200 paise 4 half-rupee coins = 4 × 50 paise = 200 paise Total money with Arun = 500 paise + 200 paise + 200 paise = 900 paise

Cost of a soap = Rs 8.75 = 8 rupees 75 paise = 8 × 100 paise + 75 paise = 800 paise + 75 paise = 875 paise

Money left with Arun after buying a soap = 900 paise − 875 paise = 25 paise = Rs 0.25

900-875025Thus, after buying a soap, Arun will get back Rs 0.25.

(5) (a) Cost of an egg = Rs 2.50 = 2 rupees 50 paise = 2 × 100 paise + 50 paise = 200 paise + 50 paise = 250 paise

Now, one dozen eggs = 12 eggs So, one and a half dozen eggs = 12 + 6 = 18 eggs

Cost of 18 eggs = 18 × 250 paise = 4500 paise = Rs 45

Thus, cost of one and half a dozen eggs is Rs 45.

(b) Total money with Kannan = Rs 60 Cost of one and a half dozen eggs = Rs 45 Total money left with Kannan after buying eggs  = Rs 60 − 45 = Rs 15 = 1500 paise

Now, Kannan uses the money that is left for purchasing pens. Cost of a pen = Rs 6.50 = 6 rupees 50 paise = 6 × 100 paise + 50 paise = 600 paise + 50 paise = 650 paise

Cost of 2 pens = 2 × 650 paise = 1300 paise = Rs 13

So, Kannan can buy only two pens with the amount of money that was left with him after purchasing eggs. Now, money left with Kannan after purchasing pens = 1500 paise − 1300 paise = 200 paise = Rs 2 Thus, Kannan was left with Rs 2 after buying 2 pens.

(6) The price of two pens is Rs 13. She can buy two pens.

Answer:

Answer:

Total number of strips in the sheet = 10 Number of blue coloured strips = 1 So, part of the sheet that is blue =

110Thus,

110of the sheet is blue.

Number of green coloured strips = 3 So, part of the sheet that is green =

310Thus,

310of the sheet is green.

Number of yellow coloured strips = 2 So, part of the sheet that is  yellow =

210                                                         = 0.2

Thus,

210of the sheet is yellow.

Answer:

Number of boxes in 1 strip = 10 There are a total of 10 strips in the sheet. So, number of boxes in 10 strips = 10 × 10 = 100 Yes, each box is

1100part of the sheet.

There are 10 blue boxes in the sheet. Yes blue equals to

10100of the sheet. It is given that blue is equal to

110of the sheet. Now,

110 = 1 × 1010 × 10 = 10100Thus,

110is also equal to

10100of the sheet. And,

110= 0.1

So,

10100=

110= 0.10 = 0.1

Now, 100 paise = Re 1 So, we need ten 10 paise coins to make Re 1. Thus, we can say that 10 paise is

110of a rupee. Now,

110= 0.1 So, 10 paise is 0.1 of a rupee.

There are a total of 15 red boxes in the sheet. Total number of boxes in the sheet = 100 Part of the sheet that is red =

15100Now,

15100 = 0.15So, 0.15 of the sheet is red.

It is given that

3100of the sheet is black. Now,

3100 = 0.03So, we can say that 0.03 of the sheet is black.

There are a total of 22 white boxes in the sheet.

So, part of the sheet that is white =

22100                                                       = 0.22 Thus, 0.22 of the sheet is white.

Answer:

It is given that 4.50 m is longest jump.

Thus, Rehana is the winner in the long jump.

The 1st winner is Rehana, 2nd winner is Meena, and 3rd winner is Teena.

We know that, 100 cm = 1 m so, 1 cm =

1100m 1 cm = 0.01 m

So, we can also write 1 cm as 0.01 m.

Answer:

We know that , 100 cm = 1 m 1 cm =

1100m = 0.01 m Now, 3 m 45 cm = 3 +

45100m = 3 + 0.45 m = 3.45 m

99 cm =

99100m

= 0.99 m

1 m 5 cm = 1 +

5100m = 1 + 0.05 m = 1.05 m

Answer:

Dinesh has to grow 45 cm more to reach the height of 2 m. Now, 1 m = 100 cm So, 2 m = 200 cm

Height of Dinesh = 200 − 45 = 155 cm

200-45155Now, 155 cm = 100 + 55 cm = 1 m 55 cm

Thus, Dinesh’s height is 1 m 55 cm.

Answer:

(A) The money of England will cost the most in Indian Rupees as 1 pound is equal to Rs 77.76

(B) We find from the chart that, 1 US dollars = Rs 39.70 = 39 rupees 70 paise = 39 × 100 paise + 70  paise = 3900 paise + 70 paise = 3970 paise

10 US dollars = 10 × 3970 paise = 39700 paise = Rs 397.00

So, Mithun got Rs 397.00 from his uncle as a gift.

Money spent on school trip by Mithun = Rs 350.00 So, money left with Mithun = Rs 397.00 − 350.00 = Rs 47.00

397.00-350.00047.00(C)  Here, we are considering the exchange rates of Dirham in place of Saudi Riyal. Salary of Majeed’s father = 1000 Dirham

We find from the chart that, 1 Dirham = Rs10.80 = 10 rupees 80 paise = 10 × 100 + 80 paise = 1000 + 80 paise = 1080 paise

So, 1000 Dirhams =  1000 × 1080 paise =  1080000 paise = Rs 10800

Therefore, salary of Majeed’s father = Rs 10800.00

Salary of Arun’s father = 2000 Sri Lankan Rupees We find from the chart that, 1 Sri Lankan Rupee  = Re 0.37 = 37 paise

So, 2000 Sri Lankan Rupees = 2000 × 37 paise = 74000 paise = Rs 740.00

Therefore, salary of Arun’s father = Rs 740

Thus, Majeed’s father gets more salary in Indian Rupees than Arun’s father.

(D) Price of present bought by Leena’s aunty = 30 Yuan

We find from the chart that,

1 Yuan = Rs 5.50 = 5 rupees 50 paise = 5 â€‹× 100 + 50 paise = 500 + 50 paise = 550 paise

So, 30 Yuan = 30 â€‹× 550 paise = 16500 paise = Rs 165

So, the cost of the gift in Indian Rupees is Rs 165.00

(E) (1) We find from the chart,

1 Won = Re 0.04 = 4 paise

We know that, Re 1 = 100 paise So, Rs 4 = 4 × 100 paise = 400 paise Rs 400 = 400 × 100 paise = 40000 paise

Now,  4 paise = 1 Won So, 400 paise = 400 ÷ 4 Won = 100 Won

and 40000 paise = 40000 â€‹÷ 4 Won = 10000 Won

Thus, Astha can change 100 Won for Rs 4, and 10000 Won for Rs 400.

(2) We find from the chart,

1 Hong Kong Dollar = Rs 5.10 = 5 rupees 10 paise = 5 × 100 + 10 paise = 500 + 10 paise = 510 paise

Total money with Astha = Rs 508 = 508 × 100 paise = 50800 paise

50800 paise = 50490 + 310 paise

50800 paise = 510 × 99 + 310 paise

50800 paise = 510 HKD + 310 paise

Now, 310 paise = 300 paise + 10 paise = 3 rupees and 10 paise = Rs 3.10

Thus, Astha can change 99 HKD for Rs 508 and Rs 3.10 is left with her.

Answer:

Answer:

(1) Mumbai had the highest temperature i.e. 35.1°C at 3 pm. Srinagar was the coolest place with the temperature of 8.1°C at 3 pm.

(2) Temperature of Mumbai at 3 pm = 35.1^∘C Temperature of Srinagar at 3 pm = 8.1^∘C Difference in temperature             = 35.1^∘C − 8.1^∘C = 27^∘C

(3) Temperature of Thiruvananthapuram at 3 pm = 33.5^∘C Rise in the temperature needed to attain a temperature of 40^∘C = 40^∘C − 33.5^∘C = 6.5^∘C

(4) Temperature of Chennai at 3 pm = 29.9^∘C Temperature of Kolkata at 3 pm = 26.6^∘C Difference between temperature = 29.9^∘C − 26.6^∘C = 3.3^∘C (5) (a) Temperature of Srinagar at 3 am = 1.3^∘C It will be very cold there.

(b) Temperature of Chennai at 3 pm = 29.9^∘C Temperature of Chennai at 3 am = 21.1^∘C Difference between temperature = 29.9^∘C − 21.1^∘C = 8.8^∘C

Temperature of Bhopal at 3 pm = 25.9^∘C Temperature of Bhopal at 3 am = 9.8^∘C Difference between temperature = 25.9^∘C − 9.8^∘C =16.1^∘C