Creative Thinking Problems

From Accelerated Learning Primary Mathematics 3 by Ching Kheng Huat published in 1999 in Singapore. Have fun!

1. For both piles to have the same weight, which item belonging to the pile on the left should be exchanged with another item belonging to the pile on the right?

2. Replace the letters with numbers.

TEAR
+EAR
TALE

3. Fill in the boxes with appropriate numbers.