a. 16.(38-2)-38.(16-1)
b. (187-23)-(20-180)
c. (37-17).(-9)+35.(-9-11)
d. (-8).25.(-2).4.(-5).125
a. 16.(38-2)-38.(16-1) b. (187-23)-(20-180) c. (37-17).(-9)+35.(-9-11) d. (-8).25.(-2).4.(-5).125
By Sadie
By Sadie
a. 16.(38-2)-38.(16-1)
b. (187-23)-(20-180)
c. (37-17).(-9)+35.(-9-11)
d. (-8).25.(-2).4.(-5).125
Đáp án:
Giải thích các bước giải:
$a)16.(38-2)-38.(16-1)$
$=16.38-16.2-38.16+38.1$
$=38-32$
$=6$
$b)(187-23)-(20-180)$
$=164+160$
$=324$
$c)(37-17).(-9)+35.(-9-11)$
$=20.(-9)+35.(-20)$
$=-20.(9+35)$
$=-20.44$
$=-880$
$ $
$d)(-8).25.(-2).4.(-5).125$
$=(-8).125.25.4.(-2).(-5)$
$=-1000.100.10$
$=-1000000$
` a) ` ` 16.(38 – 2) – 38.(16 – 1) `
` = 16.38 – 16.2 – 38.16 + 38.1 `
` = 16.(38 – 2 – 38) + 38 `
` = 16.(-2) + 38 `
` = -32 + 38 `
` = 6 `
` b) ` ` (187 – 23) – (20 – 180) `
` = 164 + 160 `
` = 324 `
` c) ` ` (37 – 17) . (-9) + 35 . (-9 – 11) `
` = 37 . (-9) – 17.(-9) + 35.(-9) – 35.11 `
` = -9.(37 – 17 + 35) – 385 `
` = -9.55 – 385 `
` = -495 – 385 `
` = -880 `
` d) ` ` (-8).25.(-2).4.(-5).125 `
` = (-8 . 125).(25 . 4).[-2 . (-5)] `
` = -1000 . 100 . 10 `
` = -1000000 `