Question

resolva:

a)7,228 - 1,3 + 4
b)5/2 + 0,8 - 1/2
c)0,3 + 1/4 - 0,6
d)1,2 × 10^4 + 3,2 × 10^4



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Answer 1

Oi...

$a)7,228-1,3+4 =\\\\11,228-1,3=\\\\9,928\\\\\\b)5/2+0,8-1/2 =\\\\5/2+8/10-1/2=\\\\5/2+4/5-1/2=MMC=10\\\\25+8-5/10\\\\28/10:2\\\\14/5\\\\c)0,3+1/4-0,6=\\\\0,3+0,25-0,6=\\\\0,55-0,6\\\\-0,05\\\\d)1,2.10^4+3,2.10^4=\\\\(1,2+3,2).10^4\\\\4,4.10^4\\\\4,4.10000\\\\44000$

Espero ter ajudado