Răspuns:
a)
67 + 12 - 7 = (67 + 12) - 7 = 79 - 7 = 72
67 + 12 - 7 = 67 + (12 - 7) = 67 + 5 = 72
b)
77 + 100 + 3 = (77 + 100) + 3 = 177 + 3 = 180
77 + 100 + 3 = 77 + (100 + 3) = 77 + 103 = 180
c)
1211 + 33 + 11 = (1211 + 33) + 11 = 1244 + 11 = 1255
1211 + 33 + 11 = 1211 + (33 + 11) = 1211 + 44 = 1255
d)
86 + 2 + 9 = (86 + 2) + 9 = 88 + 9 = 97
86 + 2 + 9 = 86 + (2 + 9) = 86 + 11 = 97
e)
16 - 56 + 1200 = (16 - 56) + 1200 = - 40 + 1200 = 1160
16 - 56 + 1200 = 16 + (- 56 + 1200) = 16 + 1144 = 1160
Explicație pas cu pas:
