Here we will learn dividing 1digit number
We know that the repeated subtraction of the same number is expressed in short by division.
If there are 4 collections of lemons each having 2 lemons, how many lemons are there in total?
By the process of subtraction 2 is subtracted 4 times from 8 as 8 = 2 – 2 – 2 – 2 lemons.
By the process of division 8 ÷ 2 = 4 lemons
Thus, to get the answer we follow two process:
(i) Repeated subtraction and
(ii) Division
Hence, division and repeated subtraction of the same number are the same process.
Examples for dividing 1digit number:
(i) Suppose a doctor gives his patient 8 tablets of medicine and asks him to take 2 tablets daily. How many days will the medicine continue?
First day the patient takes 2 tablets, 8 – 2 = 6 tablets will remain.
Second day the patient will take 2 tablets, 6 – 2 = 4 tablets will remain.
Third day the patient will take 2 tablets, 4 – 2 = 2tablets will remain.
Fourth day the patient will take 2 tablets, 2 – 2 = 0 tablets will remain.
Thus, 8 – 2 – 2 – 2 – 2 = 0
or, 8 – (2 + 2 + 2 + 2)
or, 8 – 8 = 0
The medicine lasts 4 days, as 2 is subtracted repeatedly 4 times from 8.
We see 2 is subtracted 4 times from 8.
(ii) There are 9 packs of cookies. How many children can get cookies, if 3 cookies are given to each child.
First child gets 3 packs of cookies so, 9 – 3 = 6 cookies remain
Second child gets 3 packs of cookies so, 6 – 3 = 3 cookies remain
Third child gets 3 packs of cookies so, 3 – 3 = 0 cookies remain
9 – 3 – 3 – 3 = 0
or, 9 – (3 + 3 + 3) = 0
or, 9 – 9 = 0
3 packs of cookies are taken out to give the number of children as 3.
Hence, repeated subtraction and division are the same process.
In actual process the dividend is divided by the divisor in the following ways:
The sign, ‘÷’ is called the sign of division as ‘×’ is the sign of multiplication, ‘+’ is the sign of addition and ‘‘ is the sign of subtraction.
Thus, we learned how the actual process is used when the dividend is divided by the divisor to find the quotient and remainder.
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