Texas Math Models

Try “number line” or “4.5D”

Money

2.45 + 1.8 = 4.25 Grade 4

DollarsDimesPennies $110¢1¢ $2.45$1.80 + 10 dimes = $1 · 2 dimes left 4.25 $2.45 + $1.80 = $4.25 filled = $2.45 · outline = $1.80 · the same trade as card 1, in coins

How this one works

How

think dollars, dimes and pennies, then trade ten dimes for a dollar.

Best when

the problem is about money anyway.

seen one of these on a test? See it on a real question: TEKS 4.4A, adding and subtracting decimals, or TEKS 4.2G, decimals and fractions that mean the same thing.

The same problem, other ways