A=(1+2+3+...+200) : (6+8+10+...+34)
A=\(\frac{\left[\left(200-1+1\right).\left(200+1\right)\right]}{2}:\frac{\left[\left(34-6\right):2+1\right].\left(34+6\right)}{2}\)
A=20100 : 300
A=67.
B=( 41x66+34x66):(3+7+11+...+79)
B=[(41+34).66]:\(\frac{\left[\left(79-3\right):4+1\right].\left(79+3\right)}{2}\)
B=(75.66):820
B=4950:820
B=\(\frac{495}{82}\)
Tính bằng cách hợp lí
A=44.66+34.41 / 3+7+11+.....+79
B=1+2+3+...+200 / 6+8+10+...+34
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
giúp mình với
1) : Tính bằng cách hợp lý .
a) A = \(\frac{41.66+34.41}{3+7+11+...+79}\)
b) B = \(\frac{1+2+3+...+200}{6+8+10+...+34}\)
c) C = \(\frac{1..5.6+2.10.12+4.20.24+9.45.54}{1.3.5+2.6.10+4.12.20+9.27.45}\)
bài 8
cho S1=1+2;S2=3+4+5;S3=6+7+8+9;...... tính S100
bài 9
\(A=\frac{41x66+34x41}{3+7+11+....+79}\) \(B=\frac{1+2+3+4+....+200}{6+8+10+...+34}\)
\(C=\frac{1x5x6+2x10x12+4x20x24+9x45x54}{1x3x5+2x6x10+4x12x20+9x27x45}\)
ai nhanh nhất tớ tik
tinh nhanh
a,A=100+98+96+...+2-97-95-...-1
b,B=1+2-3-4+5+6-7-8+9+10-11-12+...-229-330+301+302
c,C=41*66+34*41/3+7+11+...+79
d,D=1+2+3+...+200/6+8+10+...+34
e,E=1*5*6+2*10*12+20*24*4+9*45*54/1*3*5+2*6*10+4*12*20+9*27*45
e) A=44.66+34.41 / 3+7+11+.....+79
g) B=1+2+3+...+200 / 6+8+10+...+34
h) 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)A=44.66+34.41 phần 3+7+11+...+79
b)B=1+2+3+...+200 phần 6+8+10+...+34
c)C=1.5.6+2.10.12+4.20.24+9.45.54 phần 1.3.5+2.6.10+4.12.20+9.27.45
tính bằng cách hợp lý
a) 2 x 5² - 72 : 2³
b) 200 : [ 45 - ( 7- 2 )² ]:
\(A=\frac{44.66+34.41}{3+7+11+...+79}\)
\(B=\frac{1+2+3+...+200}{6+8+10+...+34}\)
\(C=\frac{1.5.6+2.10.12+4.20.24+9.45.54}{1.3.5+2.6.10+4.12.20+9.27.45}\)
1. Tính (bằng cách hợp lý nhất0
a, -2/5. 4/7 + -3/5 . 2/7 + -3/5
b,5/9.14/17+1/17.5/9+ 2/9 . 5/12
c,-4/25: 11/79 +15/11:25/79
d, (2/101: -5/9 + -3/7). (6/5-2/5:1/3)
Please help me!!!
