3. Find the sum of the following numbers, using the most convenient grouping
(1) 3719.286.5281.
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Step-by-step explanation:
18×(−27)×30
=(18)×[(−27)×30]
Here, we will 1
st
solve square bracket.
So,
(18)×[(−27)×30]=18×[−(27×30)]
=(18)×(−810)
=(20−2)×(−810)
=(20×(−810))−(2×(−810))
=−16200−(−1620)
=−16200+1620
=−14580
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