Dream Box – Decimal Sums on the Number Line. Students use a number line to add and subtract decimals and solve for a variable in a “change unknown” situation. Lesson

CCSS.MATH.CONTENT.5.NBT.B.7

Add, subtract, multiply, and divide decimals to hundredths, 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 and explain the reasoning used.