Um aluno começou a resolver a seguinte operação: 7540
-1420

6120
-1420

4700
-2840

1860
-1420

440
-284

156
-142

a.
Analise a estratégia usada por esse aluno e complete o que está faltando para concluir a operação acima. Depois, identifique o quociente e o resto da divisão

area of part 1:

a1=base*height/2=(8+2)*(8-2-2-1)/2=10*3/2=15 ft^2

area of part 2:

a2=length*width=(8+2)*1=10 ft2

area of part 3:

a3=length*width=8*2=16 ft2

total shaded area : a1+a2+a3=41 ft2

total area of the reactangle : a=16*8=128 ft2

total area of the nonshaded region : 128-41=87 ft2

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