Adding and Subtracting (Google Docs)

I created an assignment for my students using google docs. I used a lesson plan from uen.org titled Mathematics-1st Grade, Work with Addition and Subtraction Equations. I used number 7: Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. I also used 8: Determine the unknown whole number in an addition or subtraction equation relating three whole numbers.
 Educational Technology - (Grades 3-5) Standard 8: Use technology resources (e.g., calculators, data collection probes, videos, educational software) for problem-solving, self-directed learning, and extended learning activities.
This work sheet should not be hard if you listen to the lecture in class. I hope when you get done with this work sheet you will have a better knowledge on how to add and subtract properly. If you need any help on this assignment please print the work sheet off and bring to class on April 3, 2015 and I will help you with it. You will still get full credit. This assignment is due by April 3, 2015 by 3:00 pm.