Question

The numerical experession 3/8+(-5)/7= -19/56 show that
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Answer 1

Answer:

here is the answer down below

Step-by-step explanation:

The given expression is 3/8 + (- 5/7) = - 19 / 59

The given expression is the addition of two rational numbers with the answer also being a rational number.

So the first point shows that rational numbers are closed under addition.

Second point does not hold good since the first one is true.

Third point is not valid since there is no multiplication done.

Fourth point also is not valid since there is no commutative property.

Answer 2

Answer:

3/8 + (-5/7) = (-19/56)

LHS : 3/8 + (-5/7)

• 3/8 - 5/7
• 3(7)/8(7) - 5(8)/7(8)
• 21/56 - 40/56
• (21-40) / 56
• (-19/56)

RHS : (-19/56)

LHS = RHS