![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Hướng dẫn giải:
a) 71 x 5 x 4 = 71 x (5 x 4) = 71 x 20 = 1420
b) 123 x 50 x 2 = 123 x (50 x 2) = 123 x 100 = 12300
c) 4 x 138 x 25 = (4 x 25) x 138 = 100 x 138 = 13800
d) 25 x 96 x 4 = (25 x 4) x 96 = 100 x 96 = 9600
e) 5 x 81 x 2 = (5 x 2) x 81 = 10 x 81 = 810
g) 50 x 104 x 2 = (50 x 2) x 104 = 100 x 104 = 10400
![](https://rs.olm.vn/images/avt/0.png?1311)
2 x 25 x 50 x 4
= ( 2 x 50 ) x ( 25 x 4 )
= 100 x 100
= 10000
![](https://rs.olm.vn/images/avt/0.png?1311)
2 x 4 x 6 x 8 x 50 x 25 x 125
= (2 x 50 ) x ( 4 x 25 ) x ( 125 x 8 ) x 6
= 100 x 100 x 1000 x 6
= 60000000
![](https://rs.olm.vn/images/avt/0.png?1311)
C1 : 5 x 1250 - 25 x 50
= 6250 - 1250
= 5000
C2:5 x 1250 - 25 x 50
= 5 x 1250 - (25 x 5 x 10)
= 5 x (1250 - 25 x 10)
= 5 x (1250 - 250)
= 5 x 1000
= 5000
![](https://rs.olm.vn/images/avt/0.png?1311)
b. 2 x 8 x 50 x 25 x 125 = (2 × 50) × (8 × 125) × 25
= 100 × 1000 × 25
= 100000 × 25
= 2500000
= ( 2x50) x ( 8x125) x 25
= 100 x 1000 x 25
100000 x 25
= 2500000
![](https://rs.olm.vn/images/avt/0.png?1311)
b. 2 x 8 x 50 x 25 x 125 = (2 × 50) × (8 × 125) × 25
= 100 × 1000 × 25
= 100000 × 25
= 2500000
![](https://rs.olm.vn/images/avt/0.png?1311)
(160 x 25 - 80 x 50) x (1+2+3+.....+100) = (160 x 25 - 160 x 25) x (1 + 2 + ........+ 100)
= 0 x (1+2+3+.......+100) = 0
50 +25 *2
50+50
100
=100