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chtt nha !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
a, 512*(2-128)-128*(-512)
= 512*2 - 512*128 -128*(-512)
=512*2-512*128-(-128)*512
= 512*(2-128+128)
= 512*2
=1024
b, 2155-(174+2155)+(-68+174)
=2155-174-2155+(-68)+174
= (2155-2155)+[(-174)+174]+(-68)
=0+0+(-68)
=-68
c,-78+11*(97-99)
=-78+11*(-2)
=-78+(-22)
=-100
d, |+426|+|-345|+|+456|+|-789|
= 426+345+456+789
=(426+345)+(456+789)
=771+1245
=2016
1000!.(456.789789-789.456456)
=1000!.(456.789.1001-789.456.1001)
=1000!.0=0
tick nhé
\(\text{|+429|+|-345|+|+456|+|-789|}\)
\(=429+345+456+789\)
\(=774+456+789\)
\(=1230+789\)
\(=2019\)
học tốt
a) (-125).3.(-4).(-8).(-25)
\(=\left[\left(-125\right).\left(-8\right).\right].\left[\left(-4\right).\left(-25\right)\right].3\)
\(=1000.100.3=300000\)
b) 1765-(391+1765)+(-2019+391)
\(=1765-391-1765-2101+391\)
\(=\left(1765-1765\right)+\left(-391+391\right)-2101\)
\(=0+0-2101=-2101\)
c) -24.63+24.21+(-58).24
\(=24.\left(-63+21-58\right)\)
\(=24.\left(-100\right)\)
\(=-2400\)
d) /+426/ - /-345/-/+/+446/+/-789/
\(=426-345-446+789\)
\(=424\)
chúc bạn học tốt
bạn ngọc linh ơi! phần b bạn nhình nhầm đề rồi bạn nhé
nhưng mình vẫn tích đúng cho bạn! cảm ơn bạn rất nhìu
a) 19 + 19 + 19 + ... + 19 + 77 + 77 + 77 + ... + 77
(23 số hạng) (19 số hạng)
= 19 x 23 + 77 x 19
= 19 x (23 + 77)
= 19 x 100
= 1900
b) 1000! x (456 x 789789 - 789 x 456456)
= 1000! x (456 x 789 x 1001 - 789 x 456 x 1001)
= 1000! x 0
= 0
Chúc bạn hok tốt =))) nguyen @ hoang @ phuong @ anh
123 x 456456 - 456 x 123123
= 123 x 456 x 1001 - 456 x 123 x 1001
= 0
Ủng hộ mk nha ^_-
123×456456 - 456×123123
=123 x 456 x 1001 - 123 x 456 x 1001
=0
= 426 + 345 + 456 + 789
= 2016
|+426| + |-345| + |+456| + |-789|
=426+345+456+789
=2016
Tớ làm chắc chắn đúng 100%