tinh nhanh 25.32+25.43+25.37
tinh nhanh
27.32+27.43+25.37
27.32+27.43+25.37
=27.(32+43) +25.37
27.75+25.37
rùi bn tự tính
# chikute #
27.32 + 27.43 + 25.37 = 27. ( 32+ 43) + 25.37
= 27.75 + 25.37
= 2025+ 25.37
= 2025+ 925
= 2950
27.32+27.43+25.37
=27.32+27.43+25.(27+10)
=27.32+27.43+25.27+25.10
=27.(32+43+25)+25.10
=27.100+25.10
=2700+250
=2950
k mik nha
Tính nhanh: (25.43).8
Tinh nhanh:
27.32+27.43+25.37
Tim x
3x+7x=72
Mong cac ban lam le minh can gap
Tìm x
3x + 7x = 72
(3+7)x = 72
21.x = 72
x = 72:21
x = 72/21
x = 24/7
Tính nhanh
25.37+137.25
25.37+137.25
=25.(37+137)
=25.174
=4350
hình như nhầm đề bài rồi
25 . 37 + 137 . 25
= 25 . ( 37 + 137 )
= 25 . 174
= 4350
25 . 37 + 137 . 25
= 25 . ( 37 + 137 )
= 25 . 174
= 4350
Tính nhanh
25.37+137.25
Bạn áp dụng tính chất phân phối là ra ngay thôi!!!
25.37+137.25
= 25. (37+137)
= 25.174
= 4350
Giải:
\(25.37+137.25\)
\(=25.\left(37+137\right)\)
\(=25.174\)
\(=4350\)
Vậy ...
Tính nhanh
a) 27.26 + 27.64
b) 25.37 + 25.63 - 150
c) 425.7.4 = 170.60
d) 0.9.14 + 6.17.12 + 19.4.18
a, 27.26+27.64
=27.(26+64)
=27.90
=2430
b,25.37+25.63-150
=25.(37+63)-150
=25.110-150
=2750-150
=2600
c,425.7.4=170.60
=1700.7=170.10.6
=1700.7-1700.6
=1700.(7-6)
=1700
d,0.9.14+6.17.12+19.4.18
=0+6.17.12+19.4.18
=6.3.4.17+19.4.18
=18.4.17+19.4.18
=18.4.(17+19)
=72.36=2592
25.32
49.101
\(25\cdot32=25\cdot4\cdot8\)
\(=\left(25\cdot4\right)\cdot8=100\cdot8\)
\(=800\)
\(49\cdot101=49\cdot\left(100+1\right)\)
\(=49\cdot100+49\)
\(=4900+49\)
\(=4949\)
-75.57 + 75.34 - ( 57.34 - 57.75 )
-11.45 - (-11).25 - ( 29.3+29.17 )
-12.7 -72.(-12) - ( 25.55-25.43 )
`@` `\text {Ans}`
`\downarrow`
`-75.57 + 75.34 - ( 57.34 - 57.75 )`
`= -75 . 57 + 75.34 - 57.34 + 57.75`
`= 75.( - 57 + 34 + 57) + 75.34`
`= 75.34 + 75.34`
`= (75.34) .2`
`= 2550 . 2`
`= 5100`
_______
\(-11.45 - (-11).25 - ( 29.3+29.17 )\)
`= -11. (45 - 25) - 29(3 + 17)`
`= -11.20 - 29.20`
`= 20. (-11 - 29)`
`= 20. (-40)`
`= -80`
_______
\(-12.7 -72.(-12) - ( 25.55-25.43 )\)
`= -12. (7 - 72) - 25( 55 - 43)`
`= -12.(-65) - 25.12`
`= 12.65 - 25 . 12`
`= 12(65 - 25)`
`= 12.40`
`= 480`
-25.37+137.25
-25 . 37 + 137 . 25
= 25 . ( -37 ) + 137 . 25
= 25 . [ ( -37 ) + 137 ]
= 25 . 100
= 2500
-25.37+137.25
=-925+3425
=2500
-25.37 + 137.25
= 25 . ( -37 ) + 137 . 25
= 25 . [ ( -37 ) + 137 ]
= 25 . 100
= 2500