A poster displaying subtraction by trading.
Print this poster out in tabloid size or larger and display it in your classroom.
Refer to it when you are working with subtraction concepts.
Subtraction by trading is used to subtract numbers with more than one digit.
32-12 = 20
1. Rearrange the equation so that the numbers line up above and below.
2. Do the subtractions one column at a time.
What if a column has a smaller number on top?
25-18 = 7
1. Make the 5 larger by trading 1 from the tens column.
Download this resource as part of a larger resource pack or Unit Plan.
Common Core Curriculum alignment
Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in addin...
Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
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