We cannot take half of 9 people. The even numbers, then, are the numbers divisible by 2: 2, 4, 6, 8, and so on. The odd numbers are 1, 3, 5, 7, and so on. If you do not know half of some even number, you can find it by decomposing it mentally into two even numbers whose half you do know.
To draw a shape, line or angle accurately using a compass and straightedge (ruler). Sometimes you are also allowed to use a protractor and triangle.
4. add-make an addition by combining numbers; Add 27 and 49, please!. add together. arithmetic-the branch of pure mathematics dealing with the theory of numerical calculations. compute, calculate, cipher, cypher, figure, reckon, work out-make a mathematical calculation or computation.. add-make an addition by combining numbers; Add 27 and 49, please!. add together. arithmetic-the branch of pure mathematics dealing with the theory of numerical calculations. compute, calculate, cipher, cypher, figure, reckon, work out-make a mathematical calculation or computation.