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-1911-(1234-1911)
-1911-1234+1911
(-1911+1911)-1234
0 - 1234
-1234
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\(-1+6+\left(-11\right)+16+....+996+\left(-1001\right)\)
\(=5+5+....+5+5\)
\(=5.10\)
\(=50\)
-1+6+(-11)+16+.....+996+(-1001)
=[-1+6]+[-11+16]+....+[-991+996]+(-1001)
=5 + 5 +...+ 5 + (-1001)
có 100 số 5
=5 x100+(-1001)
=500+(-1001)
=-501
k cho minh nha
chúc bạn học giỏi
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\(A=\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\frac{1}{32}\)
=> \(2A=1+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}\)
=> \(2A-A=\left(1+\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}\right)-\left(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\frac{1}{16}+\frac{1}{32}\right)\)
=> \(A=1-\frac{1}{32}=\frac{31}{32}\)
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1234 x 2014 + 2014 x 8766
= 2014 x ( 1234 + 8766 )
= 2014 x 10000
= 20140000
1357 x 2468 - 2468 x 357
= 2468 x ( 1357 - 357 )
= 2468 x 1000
= 2468000
số đo slaf
2014x(8766+1234)
=2014x10000
=20140000
1357-1357x2468-2468
=0x0
=0
k nhé bn câu b không biết đúng ko
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67.35
____________________
_chúc bạn học tốt_
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=500x(5956+458+3568+1)
=500x9983 hay 9982 j đó thì ko biết
=?
kết quả bảng 5004500 mới đúng