a) 25+81-32= 106-32= 74
b) 3×49-16=147-16 =131
c) 3×64+2×81 = 192+ 162= 354
d) (27-6):21 = 21:21 = 1
e) (144-121):1 = 23
f) 5×(169+64)= 5×233=1165
Răspuns:
a) 5×5 + 9×9 - 2×2×2×2×2= 25 + 81 - 32 = 106 - 32= 74
b) 3 × 42 - 16 = 110
c) 3×8 + 2×81= 24+162 = 186
d) (27-6) :21 = 21:21 = 1
e) (144-121) :1 = 23 :1 = 23
f) 5 × (169 + 8) = 5 × 177 = 885
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