Question

If a person who runs a tea stall earns Rs 30 in a day, how much will he earn in 10 days? _____________

And in a month? _______________
How did you get the answer? Discuss.

Answer 1

Earning of the man in 1 day = Rs 30
Earning of the man in 10 days = Rs 30 × 10
= Rs 300

We do it in the following manner:

1 times 30 is 30.
10 times 30 is 300.

Suppose there are 30 days in a month.
Earning of the man in a month or 30 days = Rs 30 × 30
= Rs 900
We do it in the following manner:
3 times 30 is 90.
30 times 30 is 900.