This year, a farmer planted 400,000 corn stalks. last year, the farmer planted 276,650 corn stalks. how many more corn stalks did the farmer plant this year then last year.

To get the difference between the two years you have to take the numbers away from eachother.
So in this case, 400,000-276,650= 123,350

This means that this year the farmer planted 123,350 more corn stalks this year compared to last year.

38+105= 143, 39+104=143, and you will find then adding the numbers on opposite sides, moving inwards yields the answer 138 every time. because of this, you’re going to multiply 138 times the number of pairs, which is 34. therefore, 34*138= 4692(i’m sorry if it’s the wrong numbers, but it’s the right concept)