17•27 + 23•17 + 50•19 = 17•( 27 + 23 ) + 50•19 = 17•50 + 50•19 = 50•( 17 + 19 ) = 50•36 = 36 • 100 : 2 = 3600 : 2 = 1800
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38•46 + 62•46 + 100•54 = 46•( 38 + 62 ) + 100•54 = 46•100 + 100•54 = 100•( 46 + 54 ) = 100•100 = 10000
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62•16 + 38•16 = 16•( 62 + 38 ) = 16•100 = 1600
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85•44 + 44•15 = 44•( 85 + 15 ) = 44•100 = 4400
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240•710 + 7100•76 = 710•( 240 + 760 ) = 710•1000 = 710000
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38•5800 + 380•520 = 380•( 580 + 520 ) = 380•1100 = 418000