Question

Ben has 43 balls and Sam has 55 balls. How many boxes can be packed with 10 balls in each box?

• A. 10 boxes
• B. 9 boxes
• C. 3 boxes
• D. 5 boxes

Answer 1

The correct option is B 9 boxes

Ben has 43 balls and Sam has 55 balls.
43 = 40 + 3
43 = 4 tens and 3 ones

55 = 50 + 5
55 = 5 tens + 5 ones

43 + 55 = (4 tens and 3 ones) + (5 tens + 5 ones)
= (4 + 5) tens + (3 + 5) ones
= 9 tens + 8 ones

So, they can pack 9 boxes with 10 balls in each box.