Numbrinia can count big numbers. To add 42 and 21, she takes apart the numbers, adding four tens to two tens to get six tens, then adding two ones and one to get three ones, and then putting together the tens and ones to get 63, the total. This is the ____ counting strategy.

Question

Quizplus · Accepted Answer

Numbrinia used decomposition strategy, where she broke down each number into tens and ones and then added them separately to get the sum.

Numbrinia Can Count Big Numbers