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Find each of the following products:
(a) \({3}\times{\left(-{1}\right)}\)
(b) \({\left(-{1}\right)}\times{225}\)
(c) \({\left(-{21}\right)}\times{\left(-{30}\right)}\)
(d) \({\left(-{316}\right)}\times{\left(-{1}\right)}\)
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Question
MathsClass 7

Find each of the following products:
(a) \({3}\times{\left(-{1}\right)}\)
(b) \({\left(-{1}\right)}\times{225}\)
(c) \({\left(-{21}\right)}\times{\left(-{30}\right)}\)
(d) \({\left(-{316}\right)}\times{\left(-{1}\right)}\)

Answer

(a) \(-3\)
(b) \(-225\)
(c) \(630\)
(d) \(316\)
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Solution

Here, we will use the below rules,
\({\left(+\right)}\times{\left(-\right)}={\left(-\right)}\)
\({\left(-\right)}\times{\left(+\right)}={\left(-\right)}\)
\({\left(-\right)}\times{\left(-\right)}={\left(+\right)}\)
\({\left(+\right)}\times{\left(+\right)}={\left(+\right)}\)
(a)\({3}\times{\left(-{1}\right)}=-{3}\)
(b)\({\left(-{1}\right)}\times{225}=-{225}\)
(c)\({\left(-{21}\right)}\times{\left(-{30}\right)}={630}\)
(d)\({\left(-{316}\right)}\times{\left(-{1}\right)}={316}\)
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