1. Calculate: $603 \cdot 38 + 225 \cdot (514 - 476) + (15 + 23) \cdot 172$
1. It holds that \(603 \cdot 38 + 225 \cdot (514 - 476) + (15 + 23) \cdot 172 = \)
\(= 603 \cdot 38 + 225 \cdot 38 + 38 \cdot 172 = \quad 1\) POINT
\(= 38 \cdot (603 + 225 + 172) = \quad 3\) POINTS
\(= 38 \cdot 1000 = \quad 1\) POINT
\(= 38000 \quad 1\) POINT
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TOTAL 6 POINTS