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# Test yourself now

High marks in science are the key to your success and future plans. Test yourself and learn more on Siyavula Practice.

• An additive inverse is a number that results in the answer $$0$$ when added to the original number.
• A multiplicative inverse is a number that results in the answer $$1$$ when multiplied by the original number.
• The multiplicative property of $$1$$ states that the product of any number and $$1$$ is that number. For example, $$25 \times 1 = 25$$.
• The additive property of $$0$$ states that the sum of any number and $$0$$ is that number. For example, $$100 + 0 = 100$$.
• A reciprocal is the inverse (or opposite) of a value. The product of the number and its reciprocal is equal to $$1$$.