23 * 47 =?
47.(23+50)-23.(47-50)
47.(23+50)-23.(47-50)=
47.73-23.-3 =
1081-23.-3 =
1058-3 =
1055
47.(23+50)-23.(47-50)
=(47.73)-23.(-3)
=3431-(-69)
=3431+69
=3500
tính hợp lí
a)29.(85-47)+85.(47-29)
b)47.(23+50)-23.(47+50)
a) 29.(85-47)+85.(47-29)= 29.85-29.47+85.47-85.29
=(29.85-85.29) -29.47+85.47
=0-29.47+85.47
= -29.47+85.47
= (-29+85).47
=56.47
= 2632
b)47.(23+50)-23.(47+50)= 47.23+47.50-23.47+23.50
=(47.23-23.47)+47.50+23.50
=0+47.50+23.50
=47.50+23.50
=(47+23).50
=70.50
=3500
tích ^.^ ~
a) 29.(85-47)+85(47-29)
=29.38+85.18
=1102+1520
=2622
b)47.(23+50)-23.(47+50)
=47.73-23.97
=3431-2231
=1200
k mình nha...^_^...kb nữa... thanks
-33.(23-47)-23.(47-33)
-33 . ( 32 - 47 ) - 23 . ( 47 - 33 )
= -33 . (-15) -23 . 14
= 495 - 322
= 173
108 *(47+23)-8 *(23+47)=
tinh nhanh 47.(23+50)-23.(47+50)
dễ vồn ..
bằng 1200 bạn ak .. check mk nhé
47 x (23+50)-23x(47+50)
=47 x 73 - 23 x 97
=(97-47)x(73-23)
=50 x 50
=2500
mình sai rùi!!!
ủng hộ nha
Cam on cau tra loi cua cac ban. Ai biet cach lam nho giup minh nhe,minh se h cho
(24*47-23)/ (24+47*23)
\(\frac{24.47-23}{24+47.23}=\frac{1105}{1105}=1\)
Thế thôi
:v
Tính nhanh
47×(23+50)-23×(47+50)
47x(23+50)-23x(47+50)
=47x23+47x50-23x47-23x50
=47x(23-23)-50x(47-23)
=47x0-50x24
=0-1200
=-1200
47 x(23 +50 )-23 x(47 +50)
=47x 23 + 47 x50 -23 x47 +23 x50
=0
47.(23+50)-23.(47+50)
=47.23+47.50-23.47+23.50
=(47.23-23.47)+47.50+23.50
=(47.23-23.47)+(47+23).50
=0+70.50
=0+3500=3500.
1,TÍNH Nhanh :
47.(23+50) - 23 . ( 47 +50)
47.(23+50)-23.(47+50)
=47.23+47.50-23.47-23.50
=47.50-23.50
=50.(47-23)
=50.24=1200
47.(23+50)-23.(47+50)
= 47.23+47.50-23.47+23.50
= 47.50-23.50
= 50.(47-23)
=50.24
=5024
chúc bạn học tốt nhé
\(47.\left(23+50\right)-23.\left(47+50\right)\)
\(=47.73-23.97\)
\(=3431-2231\)
\(=1200\)
Tính hợp lí ( nếu được )
47 . ( 23 + 50 ) - 23 . ( 47 + 50 )
85 . ( 35 - 47 ) - 35 . ( 85 - 27 )
\(47\left(23+50\right)-23\left(47+50\right)=47.23+47.50-23.47-23.50=50\left(47-23\right)=1200\)
\(85\left(35-47\right)-35\left(85-27\right)=85.35-85.47-85.35+35.27=35.27-85.47=-3050\)
56.[ 15+23] - 15.[ 23+56]
12.[ 47-23]+ 23.[12+47]
Dấu chấm là dấu nhân nha các bạn
Cảm ơn nhé
\(56.\left(15+23\right)-15.\left(23+56\right)\)
\(=\left(56.15+56.23\right)-\left(15.23+15.56\right)\)
\(=56.15+56.23-15.23-15.56\)
\(=\left(56.15-56.15\right)+\left(56.23-15.23\right)\)
\(=0.\left[23.\left(56-15\right)\right]\)
\(=23.41\)
\(=943\)
a) 56.[ 15 + 23 ] - 15.[ 23 + 56 ]
= 56. 38 - 15. 79
= 2128 - 1185
= 943
b) 12.[ 47 - 23 ] + 23. [12 + 47]
= 12 . 24 + 23. 59
= 288 + 1357
= 1645
~ chúc bạn hok tốt nha ~ ^_^