Question

calcule 4 -4/10 + 2/5? ...

Answer 1

Olá!

    $4-\dfrac{4}{10}+\dfrac{2}{5}=4-\dfrac{4}{10}+\dfrac{4}{10}=4+0=4$



Bons estudos!

Answer 2

tirar o mmc = 10
4/1-4/10+2/5= 40-4+4 =  40/10= 4
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                           10