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\(-\left(-239\right)+115+\left(-27\right)+\left(-125\right)-121\)
\(=239+115-27-125-121\)
\(=81\)
-(-239) + 115 + (-27) + (-125) - 121
= 239 + (115 - 125) + (-121 -27)
= 239 + (-10) + (-148)
= 91
\(-\left(-253\right)+178-216+\left(-156\right)-\left(-21\right)\\ =253+178-216-156+21\\ =431-216-156+21\\ =215-156+21\\ =59+21\\ =80\)
a) ( − 125 ) . ( − 5 ) .8. ( − 2 ) = ( − 125 ) .8. ( − 5 ) . ( − 2 ) = − 1000.10 = − 10000
b) ( − 127 ) . ( 1 − 582 ) − 582.127 = ( − 127 ) . ( − 581 ) − 582.127 = 127.581 − 582.127 = 127 ( 581 − 582 ) = 127. ( − 1 ) = − 127
c) ( 43 − 13 ) . ( − 3 ) + 27. ( − 14 − 16 ) = 30. ( − 3 ) + 27. ( − 30 ) = ( − 30 ) .3 + 27. ( − 30 ) = ( − 30 ) . ( 3 + 27 ) = ( − 30 ) .30 = − 90
d) 125. ( − 61 ) . ( − 2 ) 3 . ( − 1 ) 2 n = 125. ( − 62 ) . ( − 8 ) .1 = 125. ( − 8 ) . ( − 62 ) = − 1000. ( − 62 ) = 62000
a)54 : 33 + 6.52
= 54 : 27 + 6.25
= 2 + 150
= 152
b) 45.26 + 45.74 - 1500
= 45.(26 + 74) - 1500
= 45.100 - 1500
= 4500 - 1500
= 3000
c) 125 + 132 + (-125) + (-21)
= [125 + (-125)] + [132 + (-21)]
= 0 + 111
= 111
d) 11 - 13 + 15 - 17 + 19 - 21 + 23 - 25
= -2 + (-2) + (-2) + (-2)
= (-4) + (-2) + (-2)
= (-8)
a) 21-22+23-24
=-1+(-1)
=-2
b) 125-(115-99)
=125-115+99
=10+99
=109
a) \(-\left(-253\right)+178-216+\left(-156\right)-\left(-21\right)\)
\(=253+178-216-156+21\)
\(=431-216-156+21\)
\(=215-156+21\)
\(=59+21\)
\(=80\)
b) \(-\left(-239\right)+115+\left(-27\right)+\left(-125\right)-121\)
\(=239+115-27-125-121\)
\(=354-27-125-121\)
\(=327-125-121\)
\(=202-121\)
\(=81\)