Question

afla numerele necunoscute:a)a÷8=12;b)7×b=84;c)90÷5÷c=6​

Answer 1

Răspuns:

Explicație pas cu pas:

a)  a:8=12   a=8 x 12     a=96

b)  7 x b=84    b=84:7    b=12

c)  90:5:c=6    18:c=6   c=18:6     c=3

Answer 2

Răspuns:

Explicație pas cu pas:

$\bf a) ~~a : 8=12~~~\bigg|\cdot 8$

$\bf \pink{\underline{a=96}}$

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$\bf b)~~7\cdot b = 84 ~~\bigg|:7$

$\bf \purple{\underline{b = 12}}$

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$\bf c)~~ 90:5:c=6~~~\bigg|\cdot c$

$\bf 90:5=6\cdot c$

$\bf 18=6\cdot c~~~\bigg|:6$

$\bf 3=c$

$\bf \red{\underline{c=3}}$

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