a: 125x18+25x110
=125x18+125x22
=125x(18+22)
=125x40=5000
b: \(121+124+127+130+133+137+140+143\)
\(=\left(121+143\right)+\left(124+140\right)+\left(127+137\right)+\left(130+133\right)\)
\(=264+264+264+263\)
=1055
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a: 125x18+25x110
=125x18+125x22
=125x(18+22)
=125x40=5000
b: 121+124+127+130+133+137+140+143121+124+127+130+133+137+140+143
=(121+143)+(124+140)+(127+137)+(130+133)=(121+143)+(124+140)+(127+137)+(130+133)
=264+264+264+263=264+264+264+263
=1055
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