Exam question
In the number 45, what does the digit 4 represent?
4 is in the tens place, so it contributes 40.
Exam question
On a number line from 0 to 100 with even spacing, 50 sits exactly halfway.
50 is the midpoint of 0 and 100.
Exam question
How many ones are in three tens?
Example: 30 · integer
3 × 10 = 30 ones.
Exam question
What number has 9 tens and 8 ones?
9×10 + 8 = 98.