номер 190

номер 190

  • 82*7=(80+2)*7=80*7+2*7=560+14=574
    97*9=(100-3)*9=100*9-3*9=900-27=873
    63*8=(60+3)*8=60*8+3*8=480+24=504
    78*6=(70+8)*6=70*6+8*6=420+48=468
  • (продолжаю) 2*7=14= 560+14=574
    100*9 – 3*9 = 900 – 27 = 773
    63*8 = (60+3)*8 = 60*8+3*8=480+24=704
    78*6 = (80 – 2)*6 = 80*6 – 2*6 = 480 – 12 = 468