125×(40-4)
=125x40-125x4
=5000-500
=4500
45×37+37×55
=37x(45+55)
=37x100
=3700
18×125
=(20-2)x125
=20x125-2x125
=2500-250
=2250
125×(40-4)
=125x40-125x4
=5000-500
=4500
45×37+37×55
=37x(45+55)
=37x100
=3700
18×125
=(20-2)x125
=20x125-2x125
=2500-250
=2250