Resposta :
a)
[tex]7.5\cdot \:10-5\\\\7.5\cdot \:10=75\\\\=75-5\\\\=70 <[/tex]
b)
[tex]9,4x10-8 \\\\9.4\cdot \:10=94\\\\=94-8\\\\=86 <[/tex]
0.7 em decimal.
0.86 em decimal.
a)
[tex]7.5\cdot \:10-5\\\\7.5\cdot \:10=75\\\\=75-5\\\\=70 <[/tex]
b)
[tex]9,4x10-8 \\\\9.4\cdot \:10=94\\\\=94-8\\\\=86 <[/tex]
0.7 em decimal.
0.86 em decimal.