Oblicz najwygodniejszym sposobem: np. 34+158+16 = 50 + 158 = 137+53+17 = ? 42 +275+58 = ? 211 +79+31= ? 176 + 55 + 35 + 24 = ? 352+73+48+37 = ? 799+36+11+54= ? 761+54+76+39= ?

34+ 158 + 16 = 50 + 158 = 208 137 + 53 + 17 = 137 + 70 = 207 42 + 275 + 58 = 275 + 100 = 375 211 + 79 + 31 = 211 + 100 + 10 = 321 176 + 55 + 35 + 24 = 200 + 90 = 290 352 + 73 + 48 +37 = 400 + 110 = 510 799 + 36 + 11 + 54 = 810 + 90 = 900 761 + 54 + 76 +39 = 800 + 130 = 930