Complete the sentence. 10 ones and the missing number of ones equals 16.
We can use a place value chart to help. 10 ones is the same as one 10. So we write the digit one in the tens column because there is one 10. Now, let’s count how many ones are in this frame: one, two, three, four, five, six. So we can write six in the ones place on our chart.
So the missing number is six ones.