Tinh hop li ( neu co the):-23.63+23.21-58.23
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a,15+23+(-25)+(-23)=[ (-23)+23] +[(-25)+15] = 0+(-10)= -10
b,-23.63+23.21-58.23=23.(-63)+23.21-58.23=23.(-63+21-58)=23.(-100)=-2300
a)
15 + 23 + ( -25 ) + ( -23 )
= [ 15 + ( -25 ) ] + [ 23 + ( -23 ) ]
= -10 + 0
= -10.
b)
-23.63 + 23.21 - 58.23
= -23 . ( 63 - 21 + 58 )
= -23 . 100
= -2300.
-23.63 + 23.21 - 58.23
= 23.-63 + 23.21 + 23.-58
= 23.(-63+21+-58)
=23.-100
=-2300
-23.63+23.21-58.23
= 23. (-63) + 23.21 - 58.23
= 23.( -63 + 21-58)
= 23. (-100)
= -2300
-23.63+23.21-58.23=23.-63+23.21-58.23=23(-63+21-58)=23.-100=-2300
-23.63+23.21-58.23
=23.(-63)+23.21-58.23
=23.(-63+21-58)
=23.(-100)
=(-2300)
-23.63 + 23.21 - 58.23
= 23.(-63 + 21 - 58)
= 23.(-100)
= -2300
\(-23.63+23.21-58.23\\ =23.\left(-63\right)+23.21-58.23\\ =23\left(-63+21-58\right)\\ =23.\left(-100\right)=-2300\)
-23 . 63 + 23 . 21 - 58 . 23
= 23 . (-63 + 21 - 58) = 23 . (-100) = -2300
a)1125-374-1125-65+374
=(1125-1125)+(-374+374)-65
=0+0-65
=-65
a/ 1125-(374+1125)+(-65+374)
=1125-374+1125+(-65)+374
=[1125+1125]+[-374+374]+(-65)
=2250+0+(-65)
=2250+(-65)
=2185
b/ -23.63+23.21-58.23
=-23.(63+23-58)
=-23.28
=-644
( - 12 ) . ( - 13 ) + 13 . ( - 29 )
= \(12.13+13.\left(-29\right)\)
=\(13.\left[12+\left(-29\right)\right]\)
=\(13.\left(-17\right)\)
=\(-221\)
a) (-12).(-13) + 13.(-29)
= 12.13 + 13.(-29)
= 13.(12 - 29)
= 13 . (-17)
=-221
b) -23.63 + 23.21 - 58.23
= -(23.63 - 23.21 + 58.23)
= -23.(63 - 21 + 58)
= -23.100
=-2300
-23.65+23.21-58.23
=23.(-65+21-23)
= 23.(-67)= -1541
\(23\left(-63+21-58\right)=23\left(-63-37\right)=23.-100=-2300\)
\(\left(-23\right).63+23.21-58.23\)
\(=23.\left(-63+21-58\right)\)
\(=23.\left(-100\right)\)
\(=-2300\)
Có: -23.63+23.21-58.23
= 23. -63 + 23 . 21 - 58 . 23
= 23 ( -63 + 21 - 23 )
= 23 . -65
= -1495
\(-23.63+23.21-58.23\)
\(=-23.\left(63+21-58\right)\)
\(=-23.26\)
\(=-598\)
k mik nha
nhung lai co 2 so 23 va 1 so -23 nen lam the la sai