Skill 3D
Problem Solving: Subtraction

"How Many More" is the key phrase we are covering here.  Those words should key into your student that we are trying to find the "difference" between the two numbers and that subtraction can be used to find the answer. Advanced students will have learned to "count-up" from the lower to higher number to find the answer, however, in this skilll we want the student to draw a picture to help solve.

Listen while I read the problem to you. 
Draw a picture of the problem and say the answer.


Alicia saw 15 seashells on the shore. 
Maria saw 6 seashells.
How many more seashells did Alicia see than Maria?