Question

Matematico 8. Calculaţi: a) (5° +5¹ +5² +5³): 2²; c) (20+2¹+2²+2³+3²): 2²; b) 66 b) (7⁰+7¹+7²-3²): 24: d) (30+3¹ +3² +3³-2³):2
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Answer 1

a) (5⁰+5¹+5²+5³):2²=(1+5+27+75):4=(6+100):4=106:4=26,5

b) (7⁰+7¹+7²3²)-24=(1+7+49-9):24=(8+40):24=48:2=2

c) (20+2¹+2²+2³+3²)=(20+2+4+8+9)=(22+12+9)=(22+21)=22+21=43

d) (30+3¹+3²+3³-2³)÷2=(30+3+9+27-8)÷2=(33+9+19)÷2=(42+19÷2)=61:2=30,5

=(33+28)÷2=61÷2=30,5

Sper că te-am ajutat