Bỏ ngoặc các số sau :
a) – (-3+7-6)
b) + (-4-3+5)
c) – (5-9+8-3)
d) – (3-5+|7|-9)
đ) + (-10+|-3|-|+5|)
e) – (-12+14+|-5|-7)
g) – (-9+15-4+7)
h) + (-12-14+13-|-10|)
j) – (-|-5|+|-7|-3+9)
Bỏ ngoặc các số sau :
a) – (-3+7-6)
b) + (-4-3+5)
c) – (5-9+8-3)
d) – (3-5+|7|-9)
đ) + (-10+|-3|-|+5|)
e) – (-12+14+|-5|-7)
g) – (-9+15-4+7)
h) + (-12-14+13-|-10|)
j) – (-|-5|+|-7|-3+9)
$a, -(-3+7-6)$
$=3-7+6$
$=2$
$b, +(-4-3+5)$
$=-4-3+5$
$=-2$
$c, -(5-9+8-3)$
$=-5+9-8+3$
$=-1$
$d, -(3-5+|7|-9)$
$=-3+5-7+9$
$=4$
$đ, +(-10+|-3|-|+5|)$
$=-10+3-5$
$=-12$
$e, -(-12+14+|-5|-7)$
$=12-14-5+7$
$=0$
$g, -(-9+15-4+7)$
$=9-15+4-7$
$=-9$
$h, +(-12-14+13-|-10|)$
$=-12-14+13-10$
$=-23$
$j, -(-|-5|+|-7|-3+9)$
$=5-7+3-9$
$=-8$
#CHÚC BẠN HỌC TỐT
$10/1/2021
Đáp án:
Giải thích các bước giải:
`a) – (-3+7-6)`
`= 3 – 7 + 6`
`= 2`
`b) + (-4-3+5)`
`= -4 – 3 + 5`
`= -2`
`c) – (5-9+8-3)`
`= -5 + 9 – 8 + 3`
`= 4 – 8 + 3`
`= -1`
`d) – (3-5+|7|-9)`
`= -(3 – 5 + 7 – 9)`
`= -3 + 5 – 7 + 9`
`= 2 – 7 + 9`
`= 4`
`đ) + (-10+|-3|-|+5|)`
`= + (-10 + 3 – 5)`
`= -10 + 3 – 5`
`= -12`
`e) – (-12+14+|-5|-7)`
`= – (-12 + 14 + 5 – 7)`
`= 12 – 14 – 5 + 7`
`= -2 – 5 + 7`
`= 0`
`g) – (-9+15-4+7)`
`= 9 – 15 + 4 – 7`
`= -6 + 4 – 7`
`= -9`
`h) + (-12-14+13-|-10|)`
`= + (-12 – 14 + 13 – 10)`
`= -12 – 14 + 13 – 10`
`= -26 + 13 – 10`
`= -23`
`j) – (-|-5|+|-7|-3+9)`
`= -(-5 + 7 – 3 + 9)`
`= 5 – 7 + 3 – 9`
`= -2 + 3 – 9`
`= -8`
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