calculator

thingiverse

Teach students to master basic math skills with this easy-to-use print-in-place number line calculator. Simply use it to save yourself from another complicated math problem, or try it out with exponents for an added challenge. To solve addition problems (and subtraction too), start by lining up the number you want to add with the plus sign. Scan the top ring until you find the number you want to add it to. Right below this number will be your answer to the addition problem. For subtraction, line up the number you want to subtract from on the bottom ring with the amount you're subtracting on the top ring. Your answer should appear right under the plus sign. Printer Settings Printer Brand: MakerBot Printer: MakerBot Replicator 1 Rafts: They don't matter Supports: No Post-Printing Releasing the calculator To free up the top end of the calculator from the bottom, take a flat, thin tool like a putty knife or xacto and carefully work your way in and around the seam until the pieces separate.