53.39+47.39-53.21-47.42
53.39+47.39+53.21+47.21
\(53.39+47.39+53.21+47.21\)
\(=53\left(39+21\right)+47\left(39+21\right)\)
\(=53.60+47.60\)
\(=60\left(53+47\right)\)
\(=60.100\)
\(=6000.\)
Theo Thắng làm như sau : 53.39+47.39+53.21+47.2153.39+47.39+53.21+47.21
=53(39+21)+47(39+21)=53(39+21)+47(39+21)
=53.60+47.60=53.60+47.60
=60(53+47)=60(53+47)
=60.100=60.100
=6000.
53.39+47.39+53.21+47.21
= 39.(53+47)+21(53+47)
= (53+47)(39+21)
= 100.60
= 6000
53.39+47.39-53.21-47.21
53.39+47.39-53.21-47.21
=39.(53+47)-21.(53+47)
=39.100-21.100
=3900-2100
=1800
k mình nha bạn
53.39 + 47.39 - 53. 21 - 47.21
= 2067 + 1833 - 1113 - 987
= 3900 - 1113 - 987
= 2787 - 987
= 1800
53.39+47.49-53.21-47.21
39.(53+37)-21.(53+47)
39.100-21.100
100.(39-21)
100.18
1800
h cho minh nha
53.39+47.39-53.21-47.21
\(53.39+47.39-53.21-47.21\)
\(=53\left(39-21\right)+47\left(39-21\right)\)
\(=\left(39-21\right).\left(53+47\right)\)
\(=18.100\)
\(=1800\)
Mình chỉ hỏi 1 câu thôi nhé dấu chấm là dấu x hay dấu thập phân vậy
53.39-47.39-53.21-47.21
53.39-47.39-53.21-47.21
=(39.(53-47))-(21.(53-47))
=234-126
=108
39.(53+47)-21.(53+47)
39.100-21.100
3900-2100
=1800
(53 - 47).39 - (53-47).21
=6.39-6.21
=6.(39-21)
=6.18
=(tự tính nhé)
Tính : B=53.39+47.39-53.21-47.21
B= 53.39+47.39+53.21-47.21
= ( 53+47).39 + (53+47).21
= 100.39+100.21
= 100.(39+21)= 100.60=6000
tich cho minh nha
tinh nhanh:53.39+47.39-53.21-47.21
đề bài đúng rồi nhá bn Nguyễn Ngọc Quý. Cách giải như sau:
= 39.(53+47)-21.(53+47)
= 39.100-21.100
= (39-21).100
= 18.100+1800
(bn ơi ''tick'' cho mk với nhé)
bạn angel vu làm đúng rồi nhung ban ay ghi nham dau bang thanh dau cong
53.39-47.39-53.21+2.53.12+4.6.87-3.8.40
Tính nhanh :
a. 53.39 + 47.39 - 53.21 - 47.21
b. ( 252 + 2. 28 - 5.28 ) : 28
a) \(53.39+47.39-53.21-47.21\)
\(=39\left(53+47\right)-21\left(53+47\right)\)
\(=39.100-21.100\)
\(=3900-2100=1800\)
b) \(\left(252+2.28-5.28\right):28\)
\(=\left(9.28+2.28-5.28\right):28\)
\(=28\left(9+2-5\right):28\)
\(=28.6:28\)
\(=6\)
tính nhanh có thể ;53.39-47.39+53.21+47.21
\(53\cdot39-47\cdot39+53\cdot21+47\cdot21\)
\(=39\cdot\left(53-47\right)+21\cdot\left(53+47\right)\)
\(=39\cdot6+21\cdot100\)
\(=234+2100\)
\(=2334\)
53 x 39 - 47 x 39 + 53 x 21 + 47 x 21
= (53 - 47) x 39 + ( 53 + 47) x 21
= 6 x 39 + 100 x 21
= 234 + 2100
= 2334