Make math colorful! Solve equations straight from the end of the rainbow with the Rainbow Calculators & Storage Chart. A fun colorful twist on our popular Primary Calculators, each set of 30 Rainbow Calculators comes with 5 vibrant colors (red, green, blue, orange, or purple). Add some color to your elementary math classes , there's one for every day of the school week! Although the colors may be whimsical, the Rainbow Calculators do serious work: use these 4-function calculators to check addition, subtraction, multiplication, and division equations on the 8-digit display, or discover more advanced calculations like square roots, percentages, and more! Simple to use for beginners and powerful enough for older students, our Rainbow Calculators grow along with your skills. Each Rainbow Calculator operates with both solar and battery power, and stores easily inside the colorful exclusive Rainbow Storage Chart. Perfect for teacher resources and school stores!