Các câu hỏi tương tự
Bài6:Tìm x
a,x+1/4-3/8=7/12
b,x-3/14=5/14+15/21
c,3/10:x=1/10-1/20
d,x:8/25=1/2×4/5
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+149+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39*100
1 × 2 + 2 × 3 +3 × 4 + 4 × 5 + 5 × 6 + 6 × 7 + 7 × 8 + 8 × 9 + 9 × 10 + 10 × 11 +11 ×12 + 12 ×13 + 13×14 + 14×15 + 15×16 + 16×17 +17×18 + 18×19 + 19×20 + 20×21 + 21×22 + 22×23 + 23×24 + 24×25 + 25×26
1. 4 3/5 ... 4,35
2. 2 1/25 ... 2,2
3. 14,09 ... 14 1/10
4. 7 3/20 ... 7,15
điền lớn, bé, bằng
7/9 * 5/14 *3/10 * 8/13
5/13 * 7/8 * 26/15 * 4/14
74 19/35 *7/90 + 15 16/35 * 7/90
( 13 1/2 * 6 3/5 ) * ( 3 1/9 * 2 3/11)
ai làm nhanh mình tick nhé
nhớ làm cả bài nhé
7/2 + 2/25
23/5 - 11/3
3/7 -1/14
8/5 : 1/3
2 : 5/3
4/5 x 7/15
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10
2 + 4 + 6 + 8 + 10 + 12 + 14 + 16 + 18 + 20
1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 + 17 + 19
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+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30=