457+123=
(-457) + (-123)+123+257
\(\left[\left(-457\right)+257\right]+\left[\left(-123\right)+123\right]\)
\(=\left(-200\right)+0=-200\)
\(\left(-457\right)+\left(-123\right)+123+257\)
\(=\left[\left(-123\right)+123\right]+\left[\left(-457\right)+257\right]\)
\(=0+\left(-200\right)=-200.\)
-457+(-123)+23+27
Bấm máy tính ta đc kết quả là: \(-530\)
\(\text{-457+(-123)+23+27}\)
\(\text{= -457-123+23+27}\)
\(\text{= (-457+27) - (123-23)}\)
\(\text{= -430 - 100 = -530}\)
6X6X6X6X6X6X6X6X6X6X6X6X6X6X6X6X6X6X6=
3x29+457-123=
6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6.6=60935974
3.29+457-123=421 tick nha bạn
456-345=?
123+789=?
45+457-12=?
456-345=111
123+789=912
45+457-12=490
ủng hộ mik nha!
Tính
− 457 + − 123 + 23 + 237 − 135 + 48 + 140 + − 5 329 + 64 + − 329 + 36 − 464 + − 371 + 564 + 71
Bài 4:Bỏ dấu ngoặc rồi tính
a, (3965 - 2378) - (437 -1378) - 528
b, (-457) + (-123) + 23 + 237
c, (-329) - (15 - 101) - (25 - 440)
a: \(\left(3965-2378\right)-\left(437-1378\right)-528\)
\(=3965-2378-437+1378-528\)
\(=\left(3965-437-528\right)-\left(2378-1378\right)\)
\(=3000-1000=2000\)
b: \(\left(-457\right)+\left(-123\right)+23+237\)
\(=\left(-457+237\right)+\left(-123+23\right)\)
\(=-220-100=-320\)
c: \(\left(-329\right)-\left(15-101\right)-\left(25-440\right)\)
\(=-329-15+101-25+440\)
\(=\left(440-15-25\right)+\left(-329+101\right)\)
\(=400-228=172\)
45.............45
123.............213
457................145 dien dau
45 = 45
123 < 213
457 > 145
Tick mình nhé Sát thủ giấu tên
3 mũ 23, 4 mũ 15, 7 mũ 123, 8 mũ 576, 9 mũ 222, 124 mũ 33, 178 mũ 343, 457 mũ 77
Bài1:tính nhanh
a,465+[58+(-645)+(-38)]
b,(-457)+23+(-123)+237
c,(-135)+48+140+1-5)