The table shows the heights of Ella, Elijah, and Aubrey. The average height of three children is 139 cm. The digit in the ones place of Ella's height and the digit in the tens place of Aubrey's height are covered by ink blots.
- What is the digit in the ones place of Ella's height?
- What is the digit in the tens place of Aubrey's height?
Total height of the three children
= 3 x 139
= 417 cm
Total height of Ella and Elijah
= 417 - 113
= 304
304 - 170 - 109
= 25
= 2 tens 5 ones
(a) Digit in the ones place of Ella's height = 5
(b) Digit in the tens place of Aubrey's height = 2
Answer(s): (a) 5; (b) 2