410 x 815
= ( 22 ) 10 x ( 23 ) 15
= 22.10 x 23.15
= 220 x 245
= 220 + 45
= 265
\(=\left(2^2\right)^{10}.\left(2^3\right)^{15}=2^{20}.2^{45}=2^{65}\)
410 . 815 = (22)10 . (23)15 = 210 . 245 = 210+45 = 255
410 x 815
= ( 22 ) 10 x ( 23 ) 15
= 22.10 x 23.15
= 220 x 245
= 220 + 45
= 265
\(=\left(2^2\right)^{10}.\left(2^3\right)^{15}=2^{20}.2^{45}=2^{65}\)
410 . 815 = (22)10 . (23)15 = 210 . 245 = 210+45 = 255
815 + 95 + ( -815) + ( -45)
815+[95+(-815)+(-45)]
815+[95+(-815)+(-45)]=?
815[ 95+(-815)+(-45
Tính :
815 + [ 95 + ( -815 ) + ( - 45 )]
tính nhanh:
a) 815+/95/+(-815)+(-45)
Tính
a)A=455+(-311)+3789+(-144)
b)B=815+[95+(-815+(-45)]
A)38-815-(-65-815)
B)(43+863)-(137-57)
C)(27-514)-(486-73)
D)(3784+23)-3785-15
E)-3752-(29-3632)-51
G)-2023-(-2023-2021)
H)4524-(864-999)-(36+999)
35-815-(795-65)
tính nhanh :
a, 5o - 17 +2 - 50 + 15
b, 4 . 52 + 81 / 3^2 - [ 13 - 4 ]
c, 115 - [-37] + 2 + [-49 ] + [-2]
d,815 + { 95 + [- 815] + [ -45] }