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What is an easy way to multiply integers that are negative and positive?
Wiki User
∙ 16y ago
Just remember these rules:
- Multiplying two negatives results in a positive
- Multiplying two positives results in a positive
- Multiplying a negative with a positive results in a negative
- Multiplying a positive with a negative results in a negative
1) If you are multiplying a positive and a negative number just multiply the numbers and put the negative sign beside the product. The negative sign gives the direction on the number line. For example, if we have, (-2)(3) = -6. It means three times two gives 6 in the negative direction of the number line. Otherwise you can say (-2) + (-2) + (-2) = -6 2) If you are multiplying a negative number with a negative number just multiply the numbers and put the positive sign (probably no sign). There may not be a rigorous proof. But, it could be shown as follows:
Before that remember this: For any number a,
1) a.0 = 0.a = 0
2) a + (-a) = (-a) + a = 0 -a is called as additive inverse or the opposite of a.
3) a(b + c) = a.b + b.c This is called as distributive property.
4) Adding a constant on both the sides of an equation will not affect the equation.
(-1)(0) = (-1)[1 – 1]
0 = (-1)(1) + (-1)(-1)
0 = -1 + (-1)(-1)
0 + 1 = -1 + 1 +(-1)(-1)
1 = (0) + (-1)(-1)1 = (-1)(-1)
Source: www.icoachmath.com
Wiki User
∙ 16y ago
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What is an easy way to add intgers that are negative and positive?
-11+4=
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The set of positive integers contains 1 but not zero. Within the set of integers, there is the subset of positive integers, the subset of negative integers and the subset with a single element in it - zero. There are a zillion other sets that could be specified that meet the conditions set down in the question. The one cited is an easy one.
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Why does a positive times a negative produces a negative?
Because when there is a positive and a negative in the same problem, it gives you a negative. An easy way to solve problems like that is if there is an odd number of negative signs, then your answer is going to be negative. If there is an even number of negative signs, then your answer is going to be positive. (no matter if there is a positive sign in a math problem).
What is an easy way to add intgers that are negative and positive?
-11+4=
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It's easy to work it out yourself.... Multiply 100 by 49, add 50, add 100 - and you have your answer !
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Easy. -1, -2, -3, -4, -5, -6, -7, -8, -9, -10.
