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2008 x 76 +2008 x 43 - 2008 x 19
= 2008 x (76+43-19)
= 2008 x 100
= 200800
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 216 x 5 x 2
= 216 x (5x2)
= 216 x 10 = 2160
b) 4 x 76 x 25
= (4 x 25) x 76
= 100 x 76 = 7600
c) 5 x 19 x 2
= ( 5 x2 ) x 19
= 10 x 19 = 190
d) 125 x 23 x 8
= ( 125 x 8) x 23
= 1000 x 23 = 23000
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a , 25 + 35 + 76 +65 + 22
= 25+(35+65)+(76+22)
=25+100+100
=225
b , 24 + 25 + 24 x 22
=24(1+22)+25
=552+25
=577
c , 78 - 23 - 25
=78-(23+25)
=78-48
=30
![](https://rs.olm.vn/images/avt/0.png?1311)
a: Ta có: 24+35+76+65+22
=(24+76)+(35+65)+22
=222
b: Sửa đề: \(24\cdot35+24\cdot65\)
=24x100
=2400
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Bài 1:
155+855+11198
=(155+855)+11198
=1000+11198
=12198
Bài 2:
x:45 = 76-31
x:45 =45
x =45:45
x =1
1. 155 + 855 + 11 198
= ( 155 + 855 ) + 11 198
= 1010 + 11 198
= 12 208
2. x : 45 = 76 - 31
x : 45 = 45
x = 45 . 45
x = 2025
![](https://rs.olm.vn/images/avt/0.png?1311)
a, 25+35+76+65+22
=(65+35)+(76+22)+25
=100+100+25
=225
c , 78-23-25
=78-(23+25)
=78-48
=30
a , x-45=20
x=20+45
x=65
b , 45 - x=20
x =45-20
x= 25
![](https://rs.olm.vn/images/avt/0.png?1311)
a= 257 x (87+23)
=257 x 100
=25700
b=712 x (25+74)+752
=75200
c=94100
Chuẩn luôn rồi
Học tốt
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= 1500 : 25 - 1500 : 1 + 1500 : 76
= 1500 : ( 25 - 1 + 76 )
=1500 : 100
= 15
Tick nha
76.5+76+76+76.3
=76.5+76.2+76.3
=76.(5+2+3)
=76.10
=760
1273.250+749.1273+1273
=1273.250+749.1273+1273.1
=1273.(250+749+1)
=1273.1000
=1273000