Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a) 15 . 18 = (10+5).18 = 180 + 90= 270
b) 25.24 = (20+5).24 = 480 + 120 = 600
c)125.72 = (100+25) . 72 = 7200 + 1800 = 9000
d) 55.14 = 55. ( 10+4) = 550 + 220= 770
a) 15.18
=3.5.3.6
= (3.3).(5.6)
=9.30
=270
b) 25.24
=5.5.2.12
=(5.2).(5.12)
=10.60
=600
c)125.72
=25.5.8.9
=(25.8).(5.9)
=200.45
=9000
d)55.14
=5.11.2.7
=(5.2).(11.7)
=10.77
=770.Hok tốt~
a) 15.18 = 3.5.3.6= 32.5.6= 9.30 = 270
b) 25.24= 25.4.6= 100.6 = 600
c) 125.72= 5.52.4.18 = 5.100.18= 1800.5=9000
d) 55.14= 5.11.7.2 = 5.2.11.7= 10.11.7= 110.7= 770
\(a.\)
\(\left(75.68+75.53\right):121\)
\(=\left[75\left(68+53\right):121\right]\)
\(=75.121:121\)
\(=75\)
\(b.\)
\(\left(47.69+47.75\right):141+53\)
\(=\left\{\left[47\left(69+75\right)\right]:141+53\right\}\)
\(=47.144:141+53\)
\(=48+53\)
\(=101\)
\(c.\)
\(\left(77.21-21.34+21.72\right):151-15\)
\(=21\left(77-34+72\right):151-15\)
\(=21.115:151-15\)
\(=\dfrac{2415}{151}-15\)
\(=\dfrac{150}{151}\)
1) \(\left(75.68+75.53\right):121\)
\(=\left[75\left(68+53\right)\right]:121\)
\(=\left(75.121\right):121\)
\(=75\)
2) \(\left(47.69+47.75\right):141+53\)
\(=\left[47\left(69+75\right)\right]:141+53\)
\(=\left(47.144\right):141+53\)
\(=6768:141+53\)
\(=47+53\)
\(=100\)
3) \(\left(77.21-21.34+21.72\right):151-15\)
\(=\left[21\left(77-34+72\right)\right]:151-15\)
\(=\left(21.115\right):151-15\)
\(=2415:151-15\)
\(\approx1\)
mik ko hiểu cách bạn ghi
a) 187+ [921-(921+887)] ??? ri hã
Sửa đề: 8666
8666*15+170*4333
=4333*(2*15+170)
=200*4333
=866600
A = 44 . 82 -22 + 18 . 44
= 44 . 82 - 4 + 18 . 44
= 44. ( 82 + 18 ) - 4
= 44 . 100 - 4
= 4400 - 4
= 4396
Ta có: \(A=44\cdot82-2^2+18\cdot44\)
\(=44\cdot\left(82+18\right)-4\)
\(=44\cdot100-4\)
\(=4400-4=4396\)
\(=25\cdot\left(76+24\right)+75\left(147-47\right)\)
=10000
25. (76+24) + 75.(147-47)
= 25. 100 +75. 100
= 10000