Các câu hỏi tương tự
160x5-25x4) :7-3xX=36x25:9-60
(160x5-25x4):7-3xX=36x25:9-60
Tính rồi viết kết quả dưới dạng số thập phân:
a) 1/10 + 4/20 + 9/30 + 16/40 + 25/50 + 36/60 + 49/70 + 64/80 + 81/90
b: ( 4/5 x 3/8 + 4/5 x 5/8 - 4/5 x 7/8 ) : 1/2
0,25 x 611,7* 40
6,28* 18,24+18,24*3,72
36,4*99+36+0,4
9/8-( 17/3- 3/7)+ 7/8
60-13,75-26,25
giúp mik nha
Tính nhanh:
a,1/4+2/5+6/8+9/15+8/1
b,1/2+2/4+3/6+4/8+5/10+6/12+7/14+8/16+9/18+10/20
c,1/10+4/20+9/30+16/40+25/50+36/60+49/70+64/80+81/90
Tính nhanh:
a,1/4+2/5+6/8+9/15+8/1
b,1/2+2/4+3/6+4/8+5/10+6/12+7/14+8/16+9/18+10/20
c,1/10+4/20+9/30+16/40+25/50+36/60+49/70+64/80+81/90
1/5+4/10+9/15+16/20+25/25+36/30+49/35+64/60+81/45
1) Tìm x
a) (1/4 x X - 1/8) x 3/4 = 1/4
b) 12/5 : X = 14/3 x 4/7
c) x + 2/3 = 8 : 4 - 1
2) Thực hiện phép tính:
a) (1/5 + 3/4) x 1/2
b) 13/20 - (1/4 - 5/20)
c) 1/10 + 4/20 + 9/30 + 25/50 + 36/60 + 49/70 + 64/80 + 81/90
d) 2/3.5 + 2/5.7 + 2/7.9 + ... + 2/41.43
4/20+9/30+16/40+25/50+36/60+49/70+64/80