Question

те которые обведены помогите

Answer 1

431
5а*20b=(5*4)*(20*68)=20*1360=27200
4m*50n=(4*22)*(50*34)=88*1700=149600

434
13р+37р=(13*14)+(37*14)=182+518=700
72b-43b=(72*54)-(43*54)=3888-2322=1566
38х+17х-54х+х=(38*678)+(17*678)-(54*678)+678=1356
86с-35с-с+296=(86*47)-(35*47)-47+296=2004