Today, we will need to round both in order to solve the question like yesterday. However, today we will do it slightly differently.
124 + 68
Just like the last few days, start by rounding each number to the nearest 10.
What is 124 to the nearest 10?
How many did I need to add/subtract?
What is 68 to the nearest 10?
How many did I need to add/subtract?
For 124 we subtracted 4.
For 68 we added 2.
This is where the change is today.
In total we have subtracted 2.
Now, we need to solve the question.
120 + 70 = 190
Like the previous days, we need to revert the rounding we did earlier.
So, overall we subtracted 2.
If we revert this, we need to add 2.
190 + 2 = 192
Now, we are back to our original question.
124 + 68 = 192
Your turn.
38 + 147
168 + 23
99 + 72
76 + 72
67 + 146