32*15+9*16+69*32
=9*15+9*16+69*9
=9*(15+16+69)
=9*100
=900
32*15+9*16+69*32
=9*15+9*16+69*9
=9*(15+16+69)
=9*100
=900
1. Tìm ƯCLN rồi tìm ƯC của:
a. 8; 9
b. 15; 19
c. 8; 32
d. 24; 16; 8
e. 16; 32; 128
f. 105; 128; 135
a. (26-6).(-6)+42.(-7-13)
b. -15.(58-32)-26.(45-69)
c.(-37-17).9+35.(-9-110
d.-25.72+25.21-49.25
tìm số tự nhiên n để 4/3*5+8/5*9+12/9*15+...+32/n*(n+16)bằng 16/25
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+30+31+32+32+...+1000000
Rút gọn phân số :-72/45 ;9/21 ;-16/44;-15/-35;-20/-55;-32/20
\(\dfrac{4}{3.5}\) + \(\dfrac{8}{5.9}\) + \(\dfrac{12}{9.15}\)+.......+
\(\dfrac{32}{x(x+16)}\) = \(\dfrac{16}{15}\)
\(\dfrac{32}{x(x+16)}\) = \(\dfrac{16}{15}\)
\(\dfrac{HeLp}{me}\) \(\dfrac{nguyễn}{đức}{Trí}\)
Tính:
a) 16 + (– 16)
b) (– 15) + 15
c) 0 + (- 6)
d) |-58| + (-32)
69.(-32) - 32.(-49)
Viết số thích hợp vào ô trống:
a) 9 6 = 9 : 3 6 : 3 =
b) 12 − 8 = 12 : − 8 : = − 3 2
c) − 16 12 = ( − 16 ) : 12 : = 4
d) 12 15 = 12 : ( − 3 ) 15 : =
--\(\frac{41}{32}.\left(\frac{15}{8}-\frac{16}{41}\right)+\frac{15}{8}.\left(\frac{41}{32}.\frac{8}{3}\right)\)