Question

3. Calculați dau coroana și 1000puncte​

Answer 1

a)7

b)2

c)28

d)2800

Sper că te-am ajutat

Answer 2

a) 15-5×2+8:4 = 15-10+2 = 5+2 = 7

b) [63:(1+2×2+4÷2)-4×2]×7-5 = [63:(1+4+2)-8]×7-5 = (63:7-8)×7-5 = (9-8)×7-5 = 1×7-5 = 7-5 = 2

c) 9×6-2×[(11+7×3):2³+3²] = 54-2×[(11+21):8+9] = 54-2×(32:8+9) = 54-2×(4+9) = 54-2×13 = 54-26 = 28

d) {15×4+15×16-20×[(5²-3²+2³):8-2]}:10 = {60+240-20×[(25-9+8):8-2]}:10 = {300-20×[(16+8):8-2]}:10 = [300-20×(24:8-2)]:10 = [300-20×(3-2)]:10 = (300-20×1):10 = (300-20):10 = 280:10 = 28