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Mathematics 13 Online
Lura:

Math help me plz

Lura:

v

1 attachment
jhonyy9:

like a first step minus time minus = ?

Lura:

positive

jhonyy9:

ok and so in this way will result the first fraction plus the second one yes ?

Lura:

ok

jhonyy9:

\[-\frac{ 4 }{ 9 } + \frac{ 7 }{ 8 } = \]

Lura:

-11/9?

jhonyy9:

how you get this ? how you add two fractions ? have you heard about common denominator ?

Lura:

Ohhhhh

Lura:

-32/72+63/72=-31/72

jhonyy9:

why result this minus 31 ?

Lura:

because you subtract and negative and a positive to get a negative

jhonyy9:

in numerator will get (-32+63)/72 = ?

Lura:

31/72

jhonyy9:

perfect

jhonyy9:

questions ?

Lura:

no

jhonyy9:

ok cya

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