Must have smart notebook software to open!! This file features 3 different types of unknown addition word problems: 5+3=?, 5+?=8, and ?+3=8. 15 word problems in all. Students will write a number sentence and use a symbol for the unknown number, draw a picture to solve, and write the unknown number. The colorful pictures and background are so much more fun than just writing the problem on the board. Students can use manipulatives at their desk, write problem in math journal, or work with a