Answer:
(C) Subtract 7 from 28. Keep subtracting 7 from answer until he gets to 0. Then count the number of times 7 was subtracted.
This method is another suitable solution to problem
Step-by-step explanation:
Total number of cows the farmer has = 28 cows
Number of cows in 1 shed = 7
The number of sheds used to keep 28 cows is 28 ÷ 7 = 4 sheds
⇒4 sheds are needed to keep 28 cows.
Now choosing an alternate method:
1) Add 28 and 7 = 28 + 7 = 35 sheds
But 35 sheds ≠ 4 sheds
Hence, NOT AN APPROPRIATE METHOD.
2)Add 7 to 28. Keep adding 7 to the answer for a total of seven times.
28 + 7 .... 7 times = 28 + 7 + 7 + 7 + 7 /+ 7 + 7 + 7 = 77 ≠ 4 sheds
NOT AN APPROPRIATE METHOD.
3)Subtract 7 from 28. Keep subtracting 7 from answer until he gets to 0.
28 - 7 = 21
21 - 7 = 14
14 -7 = 7 and 7 - 7 - 0
Hence, in 4 times the answer is 0
So, the number of sheds required is 4
AN APPROPRIATE METHOD.
4) Multiply 28 by 7.
28 x 7 = 196, 196 ≠ 4 sheds
NOT A APPROPRIATE METHOD.
Hence, the ONLY alternate method to count the totals sheds required is
Subtract 7 from 28. Keep subtracting 7 from the answer until he gets to 0.
