Decimal Grid Addition Lab
Add decimals on a hundredths grid: fill squares for each addend and watch the total — including the regroup into wholes.
Decimal grid addition lab
Add two decimals as hundredths. Watch the total regroup: every 100 hundredths becomes one whole.
Try this
Add 0.30 + 0.70. How many hundredths is that? How many wholes? Now try 2.45 + 1.20.