(2x+24).53=4.55
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4.\(5^5\)-32:\(2^4\)-452-(-67+75-452)
=4.25-32:16-452-67-75+452
\(4\cdot5^4-32:2^4-452-\left(-67+75-452\right)\)
\(=4\cdot625-32:16-452+67-75+452\)
\(=2500-2+67-75\)
=2500-2-8
=2500-10
=2490
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24/53 + 75/61 - 24/53 - 14/61
= (24/53 - 24/53) + (75/61 - 14/61)
= 0 + 61/61
= 61/61 = 1
K cho mik nha~ ;w;
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sửa chỗ sai của bạn lại: 53.39+47.39-53.21-47.21
= (53+47).(39-21)
=100.18
=1800
![](https://rs.olm.vn/images/avt/0.png?1311)
a,
\(\left(325-47\right)+\left(175-53\right)\\ =325-47+175-53\\ =325+175-47-53\\ =\left(325+175\right)-\left(47+53\right)\\ =500-100\\ =400\)
b,
\(\left(756-217\right)-\left(183-53\right)\\ =756-217-183+53\\ =756+53-217-183\\ =\left(756+53\right)-\left(217+183\right)\\ =809-400\\ =409\)
c,
\(\left(-5\right)\cdot6\cdot\left(-2\right)\cdot7\\ =\left[\left(-5\right)\cdot\left(-2\right)\right]\cdot\left(6\cdot7\right)\\ =10\cdot42\\ =420\)
d,
\(24\cdot36-\left(-24\right)\cdot64\\ =24\cdot36+24\cdot64\\ =24\cdot\left(36+64\right)\\ =24\cdot100\\ =2400\)
e,
\(24\cdot36-\left(-24\right)\cdot64\\ =24\cdot36+24\cdot64\\ =24\cdot\left(36+64\right)\\ =24\cdot100\\ =2400\)
Bài 1: Tính:
a) (325+175) - (47+53)
= 500-100=400.
b) (756-217) - (183-53)
= 539-150= 389.
c) (-5).(-2).6.7
= 10.42=420
d) 24.36- (-24).64
= 864- (-1536)
= 2400.
Tick mk nha bn!!!!!
![](https://rs.olm.vn/images/avt/0.png?1311)
1: =29-16-3*2=13-6=7
2: =35-12+(-14)-2
=23-16=7
3: =4*3125-32:16
=12500-2
=12498
4: =-452+67-75+452=-8
5: =18+99*18-3^5-2^5
=1800-275
=1525
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1) 39×51+39×49=39x(51+49)=39x100=3900
2. phân tích 100 thành 50 r lm như câu 1
1. = 39 x (51 + 49)
= 39 x 100
= 3900
2. = 50 x 2 x 31 + 100 x 19
= 100 x 31 + 100 x 19
= 100 x (31 + 19)
= 100 x 50
= 5000
(2x+24).53=4.55
=> 2x+24=4.55:53
=> 2x+16=4.52
=> 2x+16=4.25
=> 2x+16=100
=> 2x=100-16
=> x=84:2
=> x=42
(2x+24).53=4.55
=> 2x +2^4 = 4.5^5:5^3
=> 2x+16 = 4.5^2
=> 2x+16 = 4.25
=> 2x+16= 100
=> 2x= 100-16
x=84
=> x= 84:2
x=42