Question

289*315+211*315

139*37-108*37+69*37

Answer 1

$1)289 \times 315 + 211 \times 315 = 315 \times (289 + 211) = 315 \times 500 = 157500 \\ \\ 2)139 \times 37 - 108 \times 37 + 69 \times 37 = 37 \times (139 - 108 + 69) = 37 \times 100 = 3700$