lesson -7 multiplication and division of decimal numbers
Answers
1.
(a) Number of ribbon pieces needed = 5
Length of each piece = 7.5 cm
Total length of ribbon needed = 7.5 *5
= 37.5 cm
(b) Cost of 1 book of Mathematics= 75.50 rupee
Cost of 15 such books = 15* 75.50 = 1,132.50
(c) 16.5 m
(d) three dozen = 36 , 135 kg
(e) 162.5 rupees
(f) 85,700 kg
I have done the first two questions with full statements. hope you get the idea as to how to write..
Answer:
(a) 37.5 cm
(b) ₹ 1,132.50
(c) 165 metres
(d) 135 kg
(e) ₹162.50
(f) 85700 kg.
Step-by-step explanation:
(a) Length of one ribbon = 7.5 cm
Therefore, Length of five such ribbons
= 7.5 X 5 = 37.5 cm
(b) Cost of one mathematics book = ₹75.50
Therefore, Cost of 15 such books
= 75.50 X 15
= ₹1,132.50
(c) Length of cloth needed to stitch 1 shirt =2.75 m
Therefore,
Length of cloth needed to stitch 6 shirts =2.75X 6
= 165 m
(d) Weight of one chair = 3.75 kg
Therefore, Weight of 3 dozen chairs
= 3.75X 3X12
=135 kg
(e) Cost of one kg mangoes = ₹65
Therefore, Cost of 2.5 kg mangoes
= 65 X 2.5
=₹162.50
(f) Weight of wheat in one bag = 85.7 kg
Therefore, Weight of wheat in 1,000 such bags
= 85.7 X 1,000
= 85700 kg
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