Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a) 2.125.2002.8.5 = (2.5).(8.125).2002 = 10.1000.2002 = 20020000
b) 36.42 + 2.17.18 + 9.41.6 = 36.42 + 36.17 + 54.41 = 36. (42 + 17) + 54.41 = 36. 59 + 54.41 = 18.2.59 + 18.3.41 = 18.118 + 18.123 = 18.(118 + 123) = 18.241 = 4338
c) 28.47 + 28.43 + 72.29 + 72.61 = 28.(47 + 43) + 72.(29 + 61) = 28.90 + 72.90 = 90.(28 + 72) = 90.100 = 9000
d) 26.54 + 52.73 = 26.54 + 2.26.73 = 26.(54 + 146) = 26.200 = 5200
a) 2.125.2002.8.5 = (2.5).(8.125).2002 = 10.1000.2002 = 20020000
b) 36.42 + 2.17.18 + 9.41.6 = 36.42 + 36.17 + 54.41 = 36. (42 + 17) + 54.41 = 36. 59 + 54.41 = 18.2.59 + 18.3.41 = 18.118 + 18.123 = 18.(118 + 123) = 18.241 = 4338
c) 28.47 + 28.43 + 72.29 + 72.61 = 28.(47 + 43) + 72.(29 + 61) = 28.90 + 72.90 = 90.(28 + 72) = 90.100 = 9000
d) 26.54 + 52.73 = 26.54 + 2.26.73 = 26.(54 + 146) = 26.200 = 5200
lam nhu vay ne
2.125.2002.8.5
=(2.5).(125.8).2002
=10.1000.2002
=20020000
c, 28.47+28.43+72.29+72.61
=28.(47+43) +72.(61+29)
=28.90+72.90
=(28+72).90
=100.90=9000
d,26.54+52.73
=(26.2).(54/2)+52.73
=52.27+52.73
=52.(27+73)
=52.100
=5200
b,36.42+2.17.18+9.41.6
=4338
cau nay minh ko tinh nhanh dc
=
a) 2.125.2002.8.5 = (2.5).(8.125).2002 = 10.1000.2002 = 20020000
b) 36.42 + 2.17.18 + 9.41.6 = 36.42 + 36.17 + 54.41 = 36. (42 + 17) + 54.41 = 36. 59 + 54.41 = 18.2.59 + 18.3.41 = 18.118 + 18.123 = 18.(118 + 123) = 18.241 = 4338
c) 28.47 + 28.43 + 72.29 + 72.61 = 28.(47 + 43) + 72.(29 + 61) = 28.90 + 72.90 = 90.(28 + 72) = 90.100 = 9000
d) 26.54 + 52.73 = 26.54 + 2.26.73 = 26.(54 + 146) = 26.200 = 5200
--thodagbun--
(Mog ko bị nữa..)
Tính nhanh:
a) 2.125 . 2002 . 8 .5
= ( 2.5 ) .( 8.5) . 2002
= 10 . 1000 . 2002
= 10000 . 2002
= 20 020 000
pr hộ chuii nha!! m.n
a) Mình ko viết lại đề nha:
= (2.5). 2002. ( 125.8)
= 10. 2002. 1000
= 20020.1000
= 20020000
b) = 28.( 47+ 43) + 72. ( 29+ 61)
= 28. 90 + 72. 90
= 90. ( 28+ 72)
= 90. 100
= 9000
c) = 36. 42 + ( 2. 18). 17 + ( 9. 6). 41
= 36. 42+ 36. 17+ 36. 41
= 36. ( 42+ 17+ 41)
= 36. 100
= 3600
d) = 26. 54+ 26.( 2. 73)
= 26. 54 + 26. 146
= 26. ( 54+ 146)
= 26. 200
= 5200
a . 2 * 125 * 2002 * 8 * 5
= 2 * 5 * 125 * 8 * 2002
= 10 * 1000 * 2002
= 20020000
c. 28 * 47 + 28 * 43 + 72 * 29 + 72 * 61
= 28 * ( 47 + 43 ) + 72 ( 29 + 61 )
= 28 * 90 + 72 * 90
= 90 ( 28 + 72 )
= 90 * 100
= 9000
d . 26 * 54 + 52 * 73
= 26 * 54 + 26 * 146
= 26 ( 54 + 146 )
= 26 * 200
= 5200
a) \(2.125.2002.8.5\)
\(=\left(2.5\right).\left(125.8\right).2002\)
\(=10.1000.2002\)
\(=20020000\)
b) \(36.42+2.17.18+9.41.6\)
\(=36.42+17.36+9.41.\left(4+2\right)\)
\(=36.42+17.36+9.41.4+9.41.2\)
\(=36.42+17.36+36.41+18.41\)
\(=36.\left(42+17+41\right)+738\)
\(=36.100+738\)
\(=3600+738\)
\(=4338\)
c) \(28.47+28.43+72.29+72.61\)
\(=28.\left(47+43\right)+72.\left(29+61\right)\)
\(=28.90+72.90\)
\(=90.\left(28+72\right)\)
\(=90.100\)
\(=9000\)
d) \(26.54+52.73\)
\(=26.2.27+52.73\)
\(=52.27+52.73\)
\(=52.\left(27+73\right)\)
\(=52.100\)
\(=5200\)