a) \(\left(165.99+165\right)-\left(163.101-163\right)\)
\(=165\left(99+1\right)-163\left(101-1\right)\)
\(=165.100-163.100\)
\(100\left(165-163\right)\)
\(=100.2\)
\(=200\)
b) \(24.62+48.19\)
\(=24.62+24.2.19\)
\(=24.62+24.38\)
\(=24\left(62+38\right)\)
\(=24.100=2400\)
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\((165.99+165)-(163.101-163)\)
\(=(165.99+165.1)-(163.101-163.1)\)
\(=165(99+1)-163(100-1)\)
\(=165.100-163.100\)
\(=(165-163).100=2.100=200\)
\(24.62+48.19\)
\(=24.62+24.2.19 \)
\(=24.62+24.38\)
\(=24(62+38)\)
\(=24.100=2400\)
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