Toán Lớp 6: 2.8.(-15).(-3)

Question

Toán Lớp 6:  2.8.(-15).(-3)                                                                                                                                                                              (-8).25.(-2).4.(-5).125 (-25).8.2.5.(-4).13 (-4).(+3).(-125).(+25).(-8)

huenthanh97 · Answer

Giải đáp:

$a) 2.8.(-15).(-3)$

$= [8.(-15)].[2.(-3)]$

$= (-120).(-6)$

$= 720$

$b) (-8).25.(-2).4.(-5).125$

$= [(-8).125].[(-2).(-5)].(25.4)$

$= (-1000).10.100$

$= -1000000$

$c) (-25).8.2.5.(-4).13$

$= [(-25).(-4)].(8.2.5.13)$

$= 100.1040$

$= 104000$

$d) (-4).(+3).(-125).(+25).(-8)$

$= [(-4).(+25)].[(-125).(-8)].(+3)$

$= (-100).1000.3$

$= -300000$

tuyethutanhthu · Answer

2 . 8 . (-15) . (-3)

= 16 . (-15) . (-3)

= (-240) . (-3)

= 720

————

(-8) . 25 . (-2) . 4 . (-5) . 125

= [(-8) . 125] . [(-2) . (-5)] . (4 . 25)

= (-1000) . 10 . 100

= -1000000

———–

(-25) . 8 . 2 . 5 . (-4) . 13

= [(-25) . (-4)] . (8 . 2 . 5 . 13)

= 100 . 1040

= 104000

————

(-4) . (+3) . (-125) . (+25) . (-8)

= [(-4) . (+25)] . [(-125) . (-8)] . (+3)

= (-100) . 1000 . 3

= -300000