Question

agora ,efetue mentalmente e registre as respotas no caderno.

a) o,2+3
b) 2x1,5
c)0,9-0,3
d)0,8÷2
e)5,4-0,4
f)4x0,5
g)2-0,3
h) 1,2+1,8
i) 7,8-5
me ajudem pfv​

Answer 1

Resposta:

$hooil\:vamos\:lá ...$

Explicação passo-a-passo:

Seguindo a ordem dos cálculos , teremos :

$a : 0.2 + 3 = 3.2 \\b : 2 \times 1.5 = 0.5 \\c : 0.9 - 0.3 = 0.6 \\ d : 0.8 \div 2 = 0.4 \\e : 5.4 - 0.4 = 5 \\ f : 4 \times 0.5 = 2 \\g : 2 - 0.3 = 1.7 \\h : 1.2 + 1.8 = 3 \\ i : 7.8 - 5 = 2.8 \\ \\ assim \: obtemos \: a \: resposta \: correta \\ .$

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