Toán Lớp 7: 42/46+250/186+-2121/2323+-125125/143143
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Toán Lớp 7: 42/46+250/186+-2121/2323+-125125/143143
Comments ( 2 )
Giải đáp+Lời giải và giải thích chi tiết:
42/46+250/186+(-2121)/2323+(-125125)/143143
=21/23 + 125/93 + (-21)/23 + (-125)/143
=(21/23+(-21)/23)+(125/93(-125)/143)
=0 + 6250/13299
=6250/13299
$@D$
\text{Lời giải :}
\frac{42}{46} + \frac{250}{186} + \frac[-2121}{2323} + \frac{-125125}{143143}
= \frac{21}{23} + \frac{125}{93} + \frac{-21}{23} + \frac{-125}{143}
= ( \frac{21}{23} + \frac{-21}{23} ) + ( \frac{125}{93} + \frac{-125}{143} )
= 0 + \frac{6250}{13299}
= \frac{6250}{13299}