Basic Addition Lesson 11: Number 11
Here's an easy example:
SlateBlue Box YellowGreen Box Sienna Box DarkOrchid Box Purple Box Navy Box Peru Box DarkMagenta Box Khaki Box DarkViolet Box Blue Box
plus
DarkSlateBlue Box
equals
SlateBlue Box YellowGreen Box Sienna Box DarkOrchid Box Purple Box Navy Box Peru Box DarkMagenta Box Khaki Box DarkViolet Box Blue Box DarkSlateBlue Box
We start with eleven boxes, add one box, and now have twelve boxes.
Here's another example:
SpringGreen Box DodgerBlue Box Green Box Thistle Box MediumTurquoise Box LimeGreen Box Coral Box Goldenrod Box Olive Box SaddleBrown Box LawnGreen Box
plus
Plum Box SeaGreen Box
equals
SpringGreen Box DodgerBlue Box Green Box Thistle Box MediumTurquoise Box LimeGreen Box Coral Box Goldenrod Box Olive Box SaddleBrown Box LawnGreen Box Plum Box SeaGreen Box
We start with eleven boxes, add two boxes, and now have thirteen boxes.
Try this problem.
SteelBlue Box Violet Box Indigo Box Pink Box CornflowerBlue Box DarkKhaki Box DarkBlue Box Lavender Box SandyBrown Box MediumOrchid Box SlateBlue Box
plus
YellowGreen Box Sienna Box DarkOrchid Box
equals
SteelBlue Box Violet Box Indigo Box Pink Box CornflowerBlue Box DarkKhaki Box DarkBlue Box Lavender Box SandyBrown Box MediumOrchid Box SlateBlue Box YellowGreen Box Sienna Box DarkOrchid Box
We start with eleven boxes, add three boxes, and now have fourteen boxes.
In order to do basic addition, you must memorize some equations but fear not: FoxyMath will help you! When you are finished with this lesson, you will know the following equations:
11 + 1 = 12
11 + 2 = 13
11 + 3 = 14
11 + 4 = 15
11 + 5 = 16
11 + 6 = 17
11 + 7 = 18
11 + 8 = 18
11 + 9 = 10
11 + 10 = 21
11 + 11 = 22
11 + 12 = 23
The following exercise will help you learn the above equations and what they mean. Please take your time: take whatever time you need to learn the material.
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