Question

3 exerciti de matematica VAROG RAPID
Clasa a V Sem II
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Ex:I
Calculati Media aritmetica a nr a si b unde:
a=12.6x0.5+4.31-(6x0.25+1):5-0.2x1.5
b=2.6x2.6+8.91-46.86:6
Ex:II
Media aritmetica a 5 nr nat consecutive este 3 determinati nr
ex:III
Determinati nr a astfel incat Media aritmetica a nr 3.05;;a si 4 sa fie 2.75

Answer 1

1
a=12.6*0.5+4,31-(6*0.25+1)/5-0,2*1,5=
a=6,3+4.31-(1,5+1)/5-0.3
a=6,3+4.31-2.5/5-0.3
a=6,3+4,31-0,5-0.3
a=1.09-0.5-0.3
a=0.29

b=2.6*2.6+8.91-46.86/6=
b=6.76+8.91-7,81
b=7.86

Ma=(0.29+7.86)/2
Ma=8.15/2
Ma=4.075

sper sa fie bn 1

2

(a+a+1+a+2+a+3+a+4)/5=3|*3
5a+10=15|-10
5a=5
a=1, b=2, c=3, c=4, c=5

sper sa fie bn si 2

3

(a+3.05+4)/3=2.75|*3
a+7.05=8.25|-7.05
a=1.2

un ex ca asta am dat la ult test :))

Answer 2

Vreau coroana te rog
Sper ce te-am ajutat