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Những câu hỏi liên quan
25 tháng 11 2023
25: \(\left(-25\right)+8-3\)
\(=\left(-25\right)+\left(8-3\right)\)
=-25+5
=-20
26: \(\left(-28\right)+2+6\)
\(=\left(-28\right)+\left(2+6\right)\)
=-28+8
=-20
27: \(\left(-1\right)+9+12\)
\(=\left(-1+12\right)+9\)
=11+9
=20
28: \(33+8-40\)
\(=\left(33+8\right)-40\)
=41-40
=1
29: \(\left(-80\right)+20+60\)
\(=\left(-80\right)+\left(20+60\right)\)
=-80+80
=0
30: \(\left(-12\right)+3+9\)
\(=\left(-12\right)+\left(3+9\right)\)
=-12+12
=0
KV
25 tháng 11 2023
25) (-25) + 8 - 3
= (-25 - 3) + 8
= -28 + 8
= -20
26) (-28) + 2 + 6
= -28 + 8
= -20
27) (-1) + 9 + 12
= -1 + (9 + 12)
= -1 + 21
= 20
28) 33 + 8 - 40
= (33 + 8) - 40
= 41 - 40
= 1
29) (-80) + 20 + 60
= -80 + (20 + 60)
= -80 + 80
= 0
30) (-12) + 3 + 9
= -12 + (3 + 9)
= -12 + 12
= 0
25 tháng 11 2023
19: \(\left(-17\right)+7-10\)
\(=\left(-17+7\right)-10\)
=-10-10
=-20
20: \(\left(-18\right)+10+8\)
\(=\left(-18\right)+\left(10+8\right)\)
=-18+18
=0
21: \(\left(-20\right)+15+5\)
\(=\left(-20\right)+\left(15+5\right)\)
=-20+20
=0
22: \(\left(-16\right)+8+8\)
\(=\left(-16\right)+\left(8+8\right)\)
=-16+16
=0
23: \(\left(-6\right)+3-3\)
\(=\left(-6\right)+\left(3-3\right)\)
=-6+0
=-6
24: \(13+3-16\)
\(=\left(13+3\right)-16\)
=16-16
=0
25 tháng 2 2023
g: =4/9(-3/4+27/4)-14/3
=4/9*6-14/3
=8/3-14/3
=-6/3=-2
h: =11/7-3/5-4/9-4/7+8/5-5/9
=8/5
k: =-9/4(2/7-16/7)-2/3
=-9/4*(-2)-2/3
=9/2-2/3
=27/6-4/6
=23/6
m: =9/17*3/11-9/17*12/11-9/17*13/11
=9/17(3/11-12/11-13/11)
=9/17*(-2)=-18/17
25 tháng 11 2023
7: \(\left(-2\right)+4-3=\left(-2-3\right)+4=-5+4=-1\)
8: \(\left(-6\right)+5+5=\left(-6\right)+\left(5+5\right)=10-6=4\)
9: \(\left(-2\right)+7+1=\left(-2\right)+\left(7+1\right)=8-2=6\)
10: \(\left(-4\right)+14-10\)
\(=\left(-4-10\right)+14\)
=14-14
=0
11: \(\left(-7\right)+5+2\)
\(=\left(-7\right)+\left(5+2\right)\)
=7-7
=0
12: \(\left(-6\right)+4+2\)
\(=\left(-6\right)+\left(4+2\right)\)
=-6+6
=0
T
6
PP
2
25 tháng 11 2023
13: \(\left(-15\right)+8+7\)
\(=\left(-15\right)+\left(8+7\right)\)
=-15+15
=0
14: \(\left(-8\right)+2+6\)
\(=\left(-8\right)+\left(2+6\right)\)
=-8+8
=0
15: \(\left(-1\right)+3-2\)
\(=\left(-1-2\right)+3\)
=-3+3
=0
16: \(25-8-7\)
\(=25-\left(8+7\right)\)
=25-15
=10
17: \(8-2-6\)
\(=8-\left(2+6\right)\)
=8-8
=0
18: \(\left(-12\right)-3+15\)
\(=\left(-12-3\right)+15\)
=-15+15
=0
DP
27 tháng 4
13: \(\left(\right. - 15 \left.\right) + 8 + 7\)
\(= \left(\right. - 15 \left.\right) + \left(\right. 8 + 7 \left.\right)\)
=-15+15
=0
14: \(\left(\right. - 8 \left.\right) + 2 + 6\)
\(= \left(\right. - 8 \left.\right) + \left(\right. 2 + 6 \left.\right)\)
=-8+8
=0
15: \(\left(\right. - 1 \left.\right) + 3 - 2\)
\(= \left(\right. - 1 - 2 \left.\right) + 3\)
=-3+3
=0
16: \(25 - 8 - 7\)
\(= 25 - \left(\right. 8 + 7 \left.\right)\)
=25-15
=10
17: \(8 - 2 - 6\)
\(= 8 - \left(\right. 2 + 6 \left.\right)\)
=8-8
=0
18: \(\left(\right. - 12 \left.\right) - 3 + 15\)
\(= \left(\right. - 12 - 3 \left.\right) + 15\)
=-15+15
=30
PP
1
S
subjects
CTVHS
3 tháng 2 2024
câu d)
\(\dfrac{6}{5}+\left(3+\dfrac{-1}{5}\right)\\ =\dfrac{6}{5}+3+\dfrac{-1}{5}\\ =1+3=4\)
câu e)
\(-\dfrac{3}{5}+\left(-\dfrac{2}{5}+2\right)\\ =\dfrac{-3}{5}+\dfrac{-2}{5}+2\\ =-1+2=1\)
câu f)
\(\dfrac{8}{3}-\left(-\dfrac{4}{3}+3\right)\\ =\dfrac{8}{3}+\dfrac{4}{3}-3\\ =4-3=1\)
1: \(\left(-5\right)+8-7=8+\left(-5-7\right)\)
=-12+8
=-4
2: \(\left(-8\right)+2+8=\left(-8+8\right)+2=0+2=2\)
3: \(\left(-1\right)+3+1\)
\(=\left(-1+1\right)+3\)
=0+3
=3
4: \(\left(-6\right)+8-14\)
\(=\left(-6-14\right)+8\)
=-20+8
=-12
5: \(\left(-4\right)+3-7\)
\(=\left(-4-7\right)+3\)
=-11+3
=-8
6: \(\left(-4\right)+5-2\)
\(=\left(-4-2\right)+5\)
=-6+5
=-1