Tính Nhanh
0.3 + 0.3 : 0.25 + 0.3 : 0.5 + 0.3 : 0.125
1) tìm x biết:
x= (6và 3/5 : 6 - 0.125 x 8 + 2 và 2/5 x 0.03)x 11/4
Tìm x biết:
x=(6và3/5-0.125*8+2vvà 2/15*0.03)*25/3
X= ( 6 3/5 : 6 - 0.125 x 8 + 2 2/15 x 0.03) x 11/4
Tinh bang cach thuan tien nhat
1/2+2+1/2×4+1/2×4
3/9+4/3+1/3×5
0.6+0.9+0.3×5
19.8 ;0.2*44.44*2*13.2:0.25/3.3*88.88*0.5*6.6:0.125*5
19.8:2*44.44*2*13.20:2
.....................................=
3.3*88.88:0.5*6,6:0.125*5
Lesson 5: Find the value of a so that (a: 0.1) + (a : 0.2) + ( a : 0.5) + ( a : 0.25 ) + ( a : 0.125) = 290
1.2+3.1+5+6.9+...+37.3+39.2
B)0.01+0.02+0.03+...0.09+0.11+0.12+0.13+...+0.19