36 * 43 + 43 * 58 +43 * 5 + 43
tính:
a) \(\dfrac{-5}{13}\)+\(\dfrac{8}{13}\) b) \(\dfrac{5}{31}\)+\(\dfrac{-22}{31}\) c) \(\dfrac{-13}{43}\)+\(\dfrac{-40}{43}\)
d) \(\dfrac{-3}{29}\)-\(\dfrac{16}{58}\) e) \(\dfrac{8}{40}\)-\(\dfrac{-36}{45}\) f) \(\dfrac{-8}{18}\)-\(\dfrac{-15}{27}\) g)(-2)+\(\dfrac{-5}{8}\)
ai có thể chỉ giúp tôi được ko vì tôi cần rất gấp
\(a,\dfrac{-5}{13}+\dfrac{8}{13}=\dfrac{3}{13}\\ b,\dfrac{5}{31}+\dfrac{-22}{31}=\dfrac{-17}{31}\\ c,\dfrac{-13}{43}+\dfrac{-40}{43}=\dfrac{-53}{43}\\ d,\dfrac{-3}{29}-\dfrac{16}{58}=\dfrac{-11}{29}\\ e,\dfrac{8}{40}-\dfrac{-36}{45}=1\\ f,\dfrac{-8}{18}-\dfrac{-15}{27}=\dfrac{1}{9}\\ g,\left(-2\right)+\dfrac{-5}{8}=\dfrac{-21}{8}\)
bài 3 : tính nhanh
a) (42*43+43*57+43)-360:4
b) 456:2*18+456:3102
c) 58*42+32*8+5+16
bài 3 : tính nhanh
a) (42*43+43*57+43)-360:4
ngoặc vuông43.(42+57+1) ngoặc vuông -90
43.100-90
4300-90
4210
b.
a) (42*43 + 43*57 + 43) - 360:4
= 43*(42+57+1) - 90
= 43*100 - 90
= 4300 - 90
= 3410
a) (42*43+43*57+43)-360:4
= 43. (42+ 57 +1) - 90
= 43 .100 - 90
= 4300 - 90 =4210
b) hình như đề sai
c) 58*42+32*8+5+16
=58. 42 + 2.16 . 8 + 5+16
= 58 . 21.2 + 16 . (2.8 + 5)
= 58 . 21 . 2 + 16 . 21
= 21 . (58 .2 + 16)
= 21 . 132
= 2771
*HỌC TỐT*
TK NHÉ, B ÊU ^^
43 x 58 -.... X x 43= 473
Thực hiện các phép tính sau :
1, 37 - 58 + 75 - 58
2, 49 - 54 + 41 - 52 + 59
3, 43 - 27 - 43 - 38 + 27
4, 18 - 43 - ( 18 - 43 ) - 51
5, ( 37 - 54 - 43 ) - ( 37 - 54 + 42 )
6, - ( 39 - 42 + 38 ) - ( 42 - 39 +38 ) + 95
Ai trả lời nhanh mình k cho !!!!! ^-^
Tính nhanh:
a) 58 x 42 + 32 x 8 + 5 x 16
b) ( 42 x 43 + 43 x 57 + 43 ) - 360 : 4 c) ( 372 - 19 x 4 ) + ( 981 : 9 - 13 )
Tính nhanh
a) 58*42+32*8+5*16.
b) ( 42*43+43*57+43) - 360:4
c ) ( 372 -19 *4 +(981:9- 13)
d) 456:2*18+456:3-102
(36+79)+(145-79-36)
10-[12-(-9-1)]
(38-29+43)-(43+38)
271-[(43)+271-(-17)]
-144-[29-(+144)-(+144)]
( 36 + 79 ) + ( 145 - 79 - 36 )
= 115 + ( 66 - 36 )
= 115 + 30
= 145
10 - [ 12 - ( - 9 - 1 ) ]
= 10 - [ 12 - ( - 10 ) ]
= 10 - 22
= - 12
( 38 - 29 + 43 ) - ( 43 + 38 )
= ( 9 + 43 ) - 81
= 52 - 81
= - 29
271 - [ ( 43 ) + 271 - ( - 17 ) ]
= 271 - [ 314 - ( - 17 ) ]
= 271 - 331
= - 60
- 144 - [ 29 - ( + 144 ) - ( + 144 ) ]
= - 144 - [ ( - 115 ) - ( + 144 ) ]
= - 144 - ( - 259 )
= 115
(36+79)+(145-79-36)
=115+30
=145
10-[12-(-9-1)]
=10-22
=-12
(38-29+43)-(43+38)
=52-81
=(-29)
271-[(43)+271-(17)]
=271-297
=(-26)
-144-[29-(+144)-(+144)
=-144-(-259)
=115
(36 + 79) + (145 - 79 - 36)
= 36 + 79 + 145 - 79 - 36
= (36 - 36) + (79 - 79) + 145
= 0 + 0 + 145
= 145
10 - [12 - (-9 - 1)]
= 10 - [12 + 9 + 1]
= 10 - 12 - 9 - 1
= 10 - 12 - (9 + 1)
= 10 - 12 - 10
= (10 - 10) - 12
= 0 - 12
= -12
(38 - 29 + 43) - (43 + 38)
= 38 - 29 + 43 - 43 - 38
= (38 - 38) + (43 - 43) - 29
= 0 + 0 - 29
= -29
271 - [(43) + 271 - (-17)]
= 271 - [43 + 271 + 17]
= 271 - 43 - 271 - 17
= (271 - 271) - (43 + 17)
= 0 - 60
= -60
-144 - [29 - (+144) - (+144)]
= -144 - [29 - 144 - 144]
= -144 - 29 + 144 + 144
= (-144 + 144) + (-29 + 144)
= 0 + 115
= 115
bài 1:Tính nhanh
a,64*25+35*25+25
b,58*42+32*8+5*16
c,(42*43+43*57+43)-360/4
d,(372-19*4)+(981/9-13)
e,456/2*8+456/3-102
a)2500
b)2772
c)1974
d)347
e)1874
k mk nha
Tính nhanh:
a) 64 x 25 + 35 x 25 + 25
b) 58 x 42 + 32 x 8 + 5 x 16
c) ( 42 x 43 + 57 x 43 + 43 ) - 360 : 4
d) 456 : 2 x 181456 : 3 - 102
* Nhanh lên nhé *
a. 64 x 25 + 35 x 25 + 25
= 64 x 25 + 35 x 25 + 25 x 1
= 25 x ( 64 + 35 + 1 )
= 25 x 100
= 2500
b. 58 x 42 + 32 x 8 + 5 x 16
c. ( 42 x 43 + 57 x 43 + 43 ) - 360 : 4
= 42 x 43 + 57 x 43 + 43 x 1 - 90
= 43 x ( 42 + 57 +1 ) - 90
= 43 x 100 - 90
= 4300 - 90
= 4210
d. 456 : 2 x 181456 : 3 - 102
Trả lời:
a,\(64\times25+35\times25+25\)
\(=25\times\left(64+35+1\right)\)
\(=25\times100\)
\(=2500\)
b,\(58\times42+32\times8+5\times16\)
\(=2436+256+80\)
\(=2772\)
c,\(\left(42\times43+57\times43+43\right)-360\div4\)
\(=43\times\left(42+57+1\right)-90\)
\(=43\times100-90\)
\(=4300-90\)
\(=4210\)
d,\(456\div2\times181456\div3-102\)
\(=228\div3\times181456-102\)
\(=76\times181456-102\)
\(=13790656-102\)
\(=13790554\)
a,64 x 25 + 35 x 25 +25
=25x(64+35+1)
=25x100
=250
b, 58 x 42 +32 x 8 +5 x 16
=2772
c,(42 x 43 +57 x 43+43 )-360:4
=43x(42+57+1) - 360 :4
= 43 x 100 -90
=4300-90
=4210
d,456:2 x 181456:3 -102
=228x181456:3-102
=13790656-102
=13790554