Q.1
To add 274 + 81 using base ten blocks, what trading would you have to do?
We would have to combine 4 units + 8 units and trade those 12 blocks for one flat and 2 units.
We would have to combine 7 units + 8 units and trade those 15 blocks for one rod and 5 units.
We would have to combine 7 rods + 8 rods and trade those 15 blocks for one flat and 5 rods