a)
10 , 36 − 8 , 64 ¯ 1 , 72
b)
375 − 269 , 3 ¯ 105 , 7
c)
6 , 127 × 34 ¯ 24 508 183 81 ¯ 208 , 318
d)
81 , 36 1200 ¯ 6 , 78 09 360 0 9600 0000
a)
10 , 36 − 8 , 64 ¯ 1 , 72
b)
375 − 269 , 3 ¯ 105 , 7
c)
6 , 127 × 34 ¯ 24 508 183 81 ¯ 208 , 318
d)
81 , 36 1200 ¯ 6 , 78 09 360 0 9600 0000
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
Bai1 tính nhanh phép tính
a) 37581-9999
Bài2 tính nhanh
a) 36×28+36×82+64×69+64×41
b) A=41×66+34×41/3+7+11+...+79
c) 1×5×6+2×10×12+4×20×24+9×45×54/1×3×5+2×6×10+4×12×20+9×27×45
a,1\(\frac{11}{12}\) + 5/12*(4/5 - 1/10) :5/12
b, 3/4*8/9*15/16*24/15*35/36*48/49*63/64*80/81*99/100*120/121
a.(456*11+912)*37/13/74
b.[(315+372)*3+(372+315)*7]/(26*13+74.14)
c.12/{390/[500-(125+35*7)]}
d.12000-(1500*2+1800*3+1800*2/3)
e.127*36+64*127-27*100
h.2*125*18+36*252+4*223*9
i.50+51+51+...+99+100
j.24/{300/[375-(150+15*5)]}
k.1449/{[216+184/8).9]}
l.2195*1952-1952*427-1952*1768
m.20+22+24+...+96+98
n.35+38+41+...+92+95
o.{46-[(16+71*4)/15]}-2
p.222+224+226+...+444
q.(5346-2808)/54+51
r.187*(38+62)-87*(62+38)
s.25*{32/[12-4+4*(16/8)]}
mọi người giúp mình với nhé!làm cả cách các bạn giải như thế nào nhé!
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
A=2 3/10-75%-1/4+0,7
B=20%+5 1/2+40%
C=0,202×16×12,5×50
D=6/1×3+6/3×5+6/5×7+....+6/95×97+6/97×99
E=0,33+0,38+0,67+12%
F=1,45×36+1,45×64/60×3,6-40×5,4+145×5
a,2 x 31 x 12 +4 x 6 x 42 +8 x 27x 3
b, 36x 28 + 36 x 82 + 64 x 69+ 64 x 41