| Noun | 1. | arithmetic - the branch of pure mathematics dealing with the theory of numerical calculationsmath, mathematics, maths - a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement pure mathematics - the branches of mathematics that study and develop the principles of mathematics for their own sake rather than for their immediate usefulness algorism - computation with Arabic figures miscalculate, misestimate - calculate incorrectly; "I miscalculated the number of guests at the wedding" recalculate - calculate anew; "The costs had to be recalculated" average out, average - compute the average of square - raise to the second power cube - raise to the third power add together, add - make an addition by combining numbers; "Add 27 and 49, please!" multiply - combine by multiplication; "multiply 10 by 15" raise - multiply (a number) by itself a specified number of times: 8 is 2 raised to the power 3 halve - divide by two; divide into halves; "Halve the cake" quarter - divide by four; divide into quarters make - add up to; "four and four make eight" contain - be divisible by; "24 contains 6" |
| Adj. | 1. | arithmetic - relating to or involving arithmetic; "arithmetical computations" |