Question

Find the value of the given divisions:
a). \[7.9 \div 1000\]
b). \[128.9 \div 10\]

Answer 1

Hint: To solve the given question here we need to understand that while dividing a number with the tens, hundred or thousand and so on, then the decimal place will shift in leftward in the numerator to the same number of places, as there are number of zeroes in the denominator.

Complete step-by-step solution:
Here the asked question is about to solve the division in which the divisor are ten and hundred, that is in the denominator the number given have one and zeroes, so here we will use the property, where we know that the decimal places will shift towards left in the numerator to the same places as there are number of zeroes in the denominator, on solving we get:
\[ \Rightarrow 7.9 \div 1000\]
Here in the given question we have three zero in the denominator so; here the decimal will shift by three places in the numerator, on solving we get:
\[ \Rightarrow 7.9 \div 1000 = 0.0079\]
Now the second question, we have:
\[ \Rightarrow 128.9 \div 10\]
Here in the given question we have three zero in the denominator so; here the decimal will shift by three places in the numerator, on solving we get:
\[ \Rightarrow 128.9 \div 10 = 12.89\]

Note: The given question is to solve by the property of the division, and we solve further according to the rule. And if we use here the division method to solve the question then it will go a long method and will take more steps to go with.