54326x3+{34-45-(-2345)}
Tính nhanh:
1234+2345+1200+2300+34+45+343435+3409+343400+3400+35+9=
1. >,<,=
1290 ... 2345
2314 ... 45
124 ... 124
2.Tính :
250 - 50 = ?
234 + 34 = ?
4 : 4 = ?
1290<2345
2314>45
124=124
250-50=200
234+34=268
4:4=1
1290<2345
2314>45
124=124
Tính: 250-50=200
234+34=268
4:4=1
1.
1290 < 2345
2314 > 45
124 = 124
2.
250 - 50 = 200
234 + 34 = 268
4 : 4 = 1
( 2345 - 45 ) + 2345
( - 2010 ) - ( 119 - 2010 )
`(2345-45)+2345`
`=2300+2345`
`=4645`
__________________
`(-2010)-(119-2010)`
`=-2010-119+2010`
`=(-2010+2010)-119`
`=0-119`
`=-119`
Tìm X:
a) X – 34562 = 2345
b) X : 34 = 1023
a) X – 34562 = 2345
X= 2345 + 34562
X = 36907
b) X : 34 = 1023
X= 1023 x 34
X =34782
12648231732904884383`2890`34`75`390724075095245093249 + 1321432897591057394858934579345 = ?
213456789647282999974 x 2345
Tính biểu thức sau:
2345 x 34 : 100 + 123,5 - 123,3
\(2345\times34:100+123,5-123,3\)
\(=79730:100+123,5-123,3\)
\(=797,3+123,5-123,3\)
\(=797,3-123,3+123,5\)
\(=674+123,5\)
\(=797,5\)
\(2345\times34:100+123,5-123,3\)
\(=79730:100+123,5-123,3\)
\(=797,3+123,5-123,3\)
\(=920,8-123,3\)
\(=797,5\)
_Chúc bạn học tốt_
79730:100+123,5-123,3
797,3+123,5-123,3
920,8-123,3
797,5
k vs mk và mk nha
Giá trị biểu thức M=(-192873).(-2345). - 4 5 .0 là:
A. -192873
B. 1
C. 0
D. (-192873).(-2345). - 4 5
Đáp án là C
Ta có: M = (-192873).(-2345). - 4 5 .0 = 0
Thực hiện phép tính ( tính nhanh nếu có thể)
a) (2345 + 45) - 2345 b) (-2010) - (119 - 2010)
c) (18 + 29) + (158 - 18 - 29) d) 126 + (-20) + 2004 + (-106)
e) (-199) + (-200) + (201) f) 99 + (-100) + 101
g) 217 + [ 43 + (-217) + (-23)]
a: \(\left(2345+45\right)-2345\)
\(=2345+45-2345\)
\(=45+\left(2345-2345\right)\)
=45+0
=45
b: \(\left(-2010\right)-\left(119-2010\right)\)
\(=-2010-119+2010\)
\(=\left(-2010+2010\right)-119\)
=0-119
=-119
c: \(\left(18+29\right)+\left(158-18-29\right)\)
\(=18+29+158-18-29\)
\(=158+\left(18-18\right)+\left(29-29\right)\)
=158+0+0
=158
d: \(126+\left(-20\right)+2004+\left(-106\right)\)
\(=126-20+2004-106\)
\(=\left(126-20-106\right)+2004\)
=0+2004
=2004
e: \(\left(-199\right)+\left(-200\right)+\left(201\right)\)
\(=-199-200+201\)
\(=-199+\left(201-200\right)\)
=-199+1
=-198
f: \(99+\left(-100\right)+101\)
\(=\left(99+101\right)-100\)
=200-100
=100
g: \(217+\left[43+\left(-217\right)+\left(-23\right)\right]\)
\(=217+43-217-23\)
\(=\left(217-217\right)+\left(43-23\right)\)
=0+20
=20
Thực hiện phép tính:
A.(2345 - 45 ) + 2345
B.(-2010)-(119 - 2010)
C (18+29)+(158-18-29)
D 126+ (-20) + 2004 +(-106)
E (-199) + (-200) + (-201)
G 217 + <43 + (-217) + (-23) >
<> Dấu này là ngoặc vuông ak
a) (2345-45)+2345
= 2300 + 2345
= 4645
b) (-2010)-(119-2010)
= -2010-119+2010
= (2010-2010)-199
= -199
c) (18+29)+(158-18-29)
= 18+29+158-18-29
= (18-18)+(29-29)+158
= 158
d) 126+(-20)+2004+(-106)
= 126 -20 + 2004 - 106
= (126-20-106) +2004
= 2004
e) (-199)+(-200)+(-201)
= -(199+200+201)
= -600
g) 217+ [43+(-217)+(-23)]
= 217+ 43 - 217 + 23
= (217-217)+(43-23)
= 20
-Học tốt-