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#8.5

Q : 3 Radhika’s mother gave her Rs $\small 10.50$ and her father gave her Rs $\small 15.80$ , find the total amount given to Radhika by the parents.

The amount Radhika got from mother = Rs $\small 10.50$

The amount Radhika got from father = Rs $\small 15.80$

Total amount Radhika have = Rs $\small 10.50$ $+$ Rs $\small 15.80$

= Rs $26.30$

Hence the total amount of money Radhika got from her parents is Rs 26.30.

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Posted by

Pankaj Sanodiya

#8.5

Q : 2 Rashid spent Rs $\small 35.75$ for Maths book and Rs $\small 32.60$ for Science book. Find the total amount spent by Rashid.

Amount spend on maths book = Rs $\small 35.75$

Amount spend on science book = Rs $\small 32.60$

Total amount spend = Rs $\small 35.75$ $+$ Rs $\small 32.60$

= Rs $68.35$

Hence the total amount spends by Rashid is Rs 68.35.

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Posted by

Pankaj Sanodiya

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#8.5

Q : 1    Find the sum in each of the following :

          (a)     $\small 0.007 + 8.5 + 30.08$

          (b)     $\small 15 + 0.632 + 13.8$

          (c)     $\small 27.076 + 0.55 + 0.004$

          (d)     $\small 25.65 + 9.005 + 3.7$

          (e)     $\small 0.75 + 10.425 + 2$

          (f)     $\small 280.69 + 25.2 + 38$

As we know that the decimal addition is exactly like normal addition and we don't change the position of decimal in the number.

So,

(a) $\small 0.007 + 8.5 + 30.08$

$0.007$

$8.500$

$+\:30.080$

$38.587$

(b) $\small 15 + 0.632 + 13.8$

$\small 15.000$

$\small 0.632$

$\small +\:13.800$

$\small 29.432$

(c) $\small 27.076 + 0.55 + 0.004$

$27.076$

$0.550$

$+\:0.004$

$27.630$

(d) $\small 25.65 + 9.005 + 3.7$

$25.650$

$9.005$

$+\:3.700$

$38.355$

(e) $\small 0.75 + 10.425 + 2$

$0.750$

$10.425$

$+\:2.000$

$13.175$

(f) $\small 280.69 + 25.2 + 38$

$280.69$

$25.20$

$+\:38.00$

$343.89$

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Posted by

Pankaj Sanodiya

#8.5

Q : 7 Ravi purchased 5 kg 400 g rice, 2 kg 20 g sugar and 10 kg 850g flour. Find the total weight of his purchases.

amount of rice purchased by Ravi = 5 kg 400 g.

amount of sugar purchased by Ravi = 2 kg 20 g.

amount of flour purchased by Ravi = 10 kg 850 g.

As we know.

For adding two numbers their unit must be the same.

So,

$5\:kg+400g=5kg+\frac{400}{1000}kg$

$=5kg+0.4kg$

$=5.4kg$

Also,

$2\:kg+20g=2kg+\frac{20}{1000}kg$

$=2kg+0.02kg$

$=2.002kg$

And,

$10\:kg+850g=10kg+\frac{850}{1000}kg$

$=10kg+0.85kg$

$=10.85kg$

So,

The total weight of the grain Ravi purchased = 5.4 kg + 2.002 kg + 10.85 kg

= 18.270 kg

Hence Ravi purchased total grain having the weight of 18.270 kg.

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Pankaj Sanodiya

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#8.5

Q: 6 Sunita travelled 15 km 268 m by bus, 7 km 7 m by car and 500 m on foot in order to reach her school. How far is her school from her residence?

The distance travelled by bus = 15 km 268 m

The distance travelled by car = 7 km 7 m

The distance travelled by foot = 500 m

As we know, when adding two numbers, their units must be the same.

So,

$15 km +268 m = 15 km + \frac{268}{1000}km$

$= 15 km + 0.268km$

$= 15.268km$

Also

$7km+7m=7km+\frac{7}{1000}km$

$=7km+0.007km$

$=7.007km$

And,

$500m=\frac{500}{1000}km$

$=0.5km$

So,

The total distance Sunita travelled = 15.268 km + 7.007 km + 0.5 km

= 22.775 km

Hence, the distance between Sunita's residence and school is 22.775 km.

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Posted by

Pankaj Sanodiya

#8.5

Q: 5. Naresh walked 2 km 35 m in the morning and 1 km 7 m in the evening. How much distance did he walk in all?

3.042

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Adnan

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#8.5

Q : 4 Nasreen bought 3 m 20 cm cloth for her shirt and 2 m 5 cm cloth for her trouser. Find the total length of cloth bought by her.

Length of cloth for shirt = 3 m 20 cm

Length of cloth for trouser = 2 m 5 cm

As we know.

For adding two numbers their unit must be the same.

So making length in meter:

$3m+20cm=3\:m+\frac{20}{100}m$

$=3\:m+0.2m$

$=3.2m$

and

$2m+5cm=2\:m+\frac{5}{100}m$

$=2\:m+0.05m$

$=2.05m$

Now,

Total Length of the cloth = 3.2 m + 2.05 m

= 5.25 m

Hence Nasreen bought clothe with a length of 5.25 m.

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Posted by

Pankaj Sanodiya