{(1+49)*5/20} + {(51+99)*5/20} = 50/4+150/4= 50
{(1+49)*5/20} + {(51+99)*5/20} = 50/4+150/4= 50
Tính nhanh: 1/10+13/10+25/10+37/10+49/10+...+87/10+99/10
tính nhanh
1+3+5+7+9+11+13+15
2+4+6+8+10+12+14+16
1+4+7+10+13+16+16+22
1+5+9+13+17+21+25+29+33+37
cứu mình với.HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
tính nhanh :
1/5+4/10+9/15+16/20+25/25+36/30+49/35+64/40+81/45
cần gấp mn !!!
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
tính nhanh
a 5/11+7/13+3/8+10/13+6/11+5/8+9/13
b 1/2nhân 9/10+1/2 nhân 8/10+1/2 nhân 8/10
tính nhanh
1/1000+13/1000+25/1000+37/1000=49/1000+....+87/1000+99/1000
tình giúm mình nha
Tính nhanh
1,6 x 12 + 8 x 4,1 - 10 : 10/8 + 8/10 x 13 + 80% x 32
1 thực hiện đảy tính sau
7/10 - 3/10 x 1/10 + 4/25
6/11 x 3/7 + 3/7 x 5/11
49 x ( 311 - 4807 : 23 ) + 98 210