12.7+12.7+12.7+12.7*7:10
Tính nhanh :
12.7 + 12.7 + 12.7 + 12.7 x 8 - 12.7
( 100 + 42 ) x 42 + ( 200 - 58 ) x 58
12,7 + 12,7 + 12,7 + 12,7 x 8 - 12,7
= 12,7 x (1 + 1 + 1 + 8 - 1)
= 12,7 x 10
= 127
(100 + 42) x 42 + (200 - 58) x 58
= 142 x 42 + 142 x 58
= 142 x (42 x 58)
= 142 x 100
= 14200
a.
12,7 + 12,7 + 12,7 + 12,7 x 8 - 12,7
= 12,7 x ( 1 + 1 + 1 + 8 - 1 )
= 12,7 x 10
= 127
b.
( 100 + 42 ) x 42 + ( 200 - 58 ) x 58
= 142 x 42 + 142 x 58
= 142 x ( 42 + 58 )
= 142 x 100
= 14200
tính nhanh
12.7+12.7+12.7+12.7x7+12.7;10
tích 10 cái cho bạn nào làm đúng
= 12.7 x (1+1+1+7) + (12,7 : 10 )
= 12,7 x 10 + 1,27
=127 + 1,27
=128,27
5^11.7^12+7^11.5^11/5^12.7^12+9.5^11.7^11 =?
\(\frac{5^{11}.7^{12}+5^{11}.7^{11}}{5^{12}.7^{12}+9.5^{11}.7^{11}}=\frac{5^{11}.7^{11}\left(7+1\right)}{5^{11}.7^{11}\left(5.7+9\right)}=\frac{8}{44}=\frac{2}{11}\)
5^11.7^12+7^11.5^11/5^12.7^12+9.5^11.7^11
-7/8.1/4+-1/3.7/8-5/12.7/8-7/8.1/2
35+12.7+3.5+17.3-3.5-20
5 mũ 12.7-5 mũ 11.10
512 . 7 - 511 . 10
= 511 . 5 . 7 - 511 . 10
= 511 . 35 - 511 . 10
= 511 .(35 - 10)
= 511 .25
= 511 . 5 . 5
= 513
A=2^10.3^10-2^10.3^9/2^9.3^10
B=5^11.7^12+7^11.5^11/5^12.7^12+9.5^11.7^11
34.6 x 12.7 - 34.6 x 2.6 -34.6
34,6 x 12 ,7 - 34,6 x 2,6 - 34,6
= 34,6 x ( 12,7 - 2,6 - 1 )
= 34,6 x 314,86
34.6 x 12.7 - 34.6 x 2.6 -34.6
=439,42-89,96-34,6
=349,46-34,6
=314,86