b, 32+5.13-3.23
c,12.5+12.95
12.95 x 99 +12.95
Ai trả lời đc tick
Tính:
\(A=\frac{4^5.13+32^2.65}{4^4.104}\)
\(A=\frac{4^5.13+32^2.65}{4^4.104}=\frac{2^{10}.13+2^{10}.13.5}{2^8.2^3.13}=\frac{2^{10}.13.\left(1+5\right)}{2^{11}.13}=\frac{6}{2}=3\)
Vậy A = 3
Tính nhanh
B=(-32).12.5.(-9).(-25)
B = [ ( - 32) . ( - 25) ] . ( 12 .5 ) . (-9)
B = 800 . 60 . (-9)
B = 48000 . (-9)
B = -432000
(-32).1.2.5.(-9).(-25)
= (-32) . 10 . (-9) . (-25)
= (-4). 8 . 10 . (-9) . (-25)
= 8 . 10 . (-9) . ( -4) . (-25)
=(-720) . 100
-72000
1. Thực hiện các phép tính sau:
a) 4.25 - 12.5 + 170 : 10;
b) (7 + 33 : 32).4 - 3;
c) 12 : {400 : [500 - (125 + 25.7)]};
d) 168 + {[2. (24 + 32) - 2560] : 72}.
a) 4.25 - 12.5 + 170 : 10
= 100 - 60 + 17
= 40 +17
= 57
b) (7 + 33 : 32).4 - 3
= (7 + 27 : 9).4 - 3
= (7 + 3).4 - 3
= 10.4 - 3
= 40 - 3
= 37
c) 12 : {400 : [500 - (125 + 25.7)]}
= 12 : {400 : [500 - (125 + 175)]}
= 12 : {400 : [500 - 300]}
= 12: {400 : 200}
= 12 : 2
= 6
d) 168 + {[2. (24 + 32) - 2560] : 72}
= 168 + {[2. (16 + 9) - 1] : 49}
= 168 + {[2. 25 - 1] : 49}
= 168 + {[50 - 1] : 49}
= 168 + {49 : 49}
= 168 + 1
= 169
12.95 x 99 x1 12.95
Ai trả lời đ tick
= 12,95 x (1 + 1) x 99
= 12,95 x 2 x 99
= 2564,1
Bài 1: Rút gọn
a; \(\dfrac{-11^5.13^7}{11^5.13^8}\)
\[\frac{{ - {{11}^5}{{.13}^7}}}{{{{11}^5}{{.13}^8}}} = \frac{{ - 1}}{{13}}\]
-11^5.13^7/11^5.13^8
\(-11^5.\frac{13^7}{11^5}.13^8=-1.13^7.13^8=-13^{15}\)
Tính nhanh:
a) 2.169.12-3.68.8-24
b) 2.56.24-3.36.16+.12.95-63.8.5
c) 57.41+50.57+43.27+73.43
e) 341.67+34.16+659.83
Rút gọn phân số -11^5.13^7/11^5.13^8