Oblicz jak najprostszym sposobem: a) 5 * 36 + 5 * 14= b)189 * 8 + 8 * 11= c) 7 * 69 - 7 * 18 = d)38 * 59 - 59 * 15 + 59 * 77=       * to jest razy  

a) 5*36+5*14=5*(36+14)=5*50+250 b)189*8+8*11=8*(189+11)=8*200=1600 c)7*69-7*18=7*(69-18)=7*51=357 d)38*59-59*15+59*77=59*(38-15+77)=59*100=5900

a) = (5 x 36) + (5 x 14) = 180 + 70= 250 b) = (189 x 8) + (8 x 11) = 1512 + 88=1600 c) = (7 x 69) - (7 x 18) = 483 - 126=357 d)  = (38 x 59) - (59 x 15) + (59 x 77)= 2242 - 885 + 4543 = 1357 + 4543=5900