Exponents Followup Term 3 Week 1

WALT: Solve number problems by using more than one strategy.

I have learnt about place value and tidy numbers. This is how I did it. I did it by 34 + 58 = 92 - 58 = 34. On my other one I did this 81 - 105 = 24. 81 + 24 = 105. 1+ 4 = 5. 80 + 20 = 100. 100 + 5 = 105.