Question

(6,7 +5,66-3,7+4,34).(-76,6.1,2 +7,66.12)

Tính nhanh nhé . Toán 6

Answer 1

=(6,7+5,66 -3,7+4,34).(-7,66.12+7,66.12)

=(6,7+5,66 -3,7+4,34).[(-7.66+7.66).12]

=(6,7+5,66 -3,7+4,34).(0.12)

=(6,7+5,66 -3,7+4,34).0

=0 

Answer 2

Ta có:

-76,6 .1,2 + 7,66 . 12 

= -7,66 .10 .1,2 + 7,66 . 12

= -7,66 . 12 + 7,66 .12

= 12 . ( -7,66 + 7,66 )

= 12 . 0

= 0

\(\Rightarrow\left(6,7+5,66-3,7+4,34\right).\left(-76,6.1,2+7,66.12\right)=\left(6,7+5,66-3,7+4,34\right).0=0\)