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Byju's Answer
Standard VII
Mathematics
Addition and Subtraction of Decimals
Bob buys 3 to...
Question
Bob buys 3 toys at ₹17 each. The total cost of the toys is ₹
.
A
51
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B
21
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C
41
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D
43
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Solution
The correct option is
A
51
Cost of 1 toy = ₹17
Cost of 3 toys = 3 x 17
We split 17 as 10 and 7 and multiply 3 by 10 and 7.
17 = 10 + 7
3 x 10 = 30
3 x 7 = 21
30 + 21 = 51
Thus, 3 x 17 = 3 x 10 + 3 x 7 = 51
Hence, the total cost of the toys is ₹51.
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