Problem Solving

I completed a task called problem solving. We were split into four different groups and had to solve a problem using place value, rounding and compensating and written algorithm.

The problem we solved was: A farm received a total of 119 millimetres of rain over a 2 month period. If 48 millimetres of rain fell on the farm in June, how many millimetres of rain fell on the farm in month 2?

First we used place value to solve the problem. first we do the ones:

119 - 48 = ??

Ones - 9 - 8 = 1

Tens - 10 - 40 is not possible so we have to add the hundred to the ten.

110 - 40 = 70.

Last step is to combine the answers. 70 + 1 = 71, So 71 millimetres fell on the farm on the second month.

This strategy is very helpful cause you can solve problems more faster.