9/4:7/8+2^3.2-7/4:5/8
9/7:7/8+2^3.2-7/4:5/8
`9/7 : 7/8 + 2^3 . 2 - 7/4 : 5/8`
`= 9/7 . 8/7 + 2^4 - 7/4 . 8/5`
`= 72/49 + 16 - 56/20`
`= 72/49 + 16/1 - 14/5`
`= 72/49 + 784/49 - 14/5`
`= 856/49 - 14/5`
`= 4280/245 - 686/245`
`= 3594/245`
`#` `\text{DKhanhhqlv}`
\(\dfrac{9}{7}:\dfrac{7}{8}+2^3.2-\dfrac{7}{4}:\dfrac{5}{8}\\ =\dfrac{72}{49}+8.2-\dfrac{14}{5}\\ =\dfrac{72}{49}+16-\dfrac{14}{5}\\ =\dfrac{856}{49}-\dfrac{14}{5}\\ =\dfrac{3594}{245}\)
bài 1 tính
a) (3/7+-9/8)+(5/8+-6/14)
b) (-5/7+3/11)+(-11/14+14/-11)
c)(-4/5+2/3)+(-5/4+19/5)+(7/3.2)
d)9/16.13/4-9/4.5/16+9/16.17/4
Cho E=2^15.0,5^5+3.2^10/2^11.2^3-2^15:2^3 Cho F=2.6^7+6^8/2^5.9^4-2.3^7+3^8 Cho G=4^5.9^4-2.6^9/2^10.3^8+6^8.20
Tính
9/7:7/8+2^3.2-7/4:5/8
\(=\dfrac{9}{7}\cdot\dfrac{8}{7}+\dfrac{2^4-7}{4}:\dfrac{5}{8}=\dfrac{72}{49}+\dfrac{18}{5}=\dfrac{1242}{245}\)
Tính;
(6^2+7^2+8^2+9^2+10^2)-(1^2+2^2+3^2+4^2+5^2)
(125^3.7^5-175^5:5):2001^2002
16.64.8^2:(4^3.2^5.16)
1+2+3+4+5+6+7+8+9+0+1+2+3+4+5+6+7+8+9+9+8+7+6+5+4+3+2+1+1+34+4+6+7+8+97+6+4+3+32+4+57+7+8+8+6+65+4+3+3+46+7+8+7+64+3+3+5+68+8+6+3+3+5+78+8+6+54+5+7+8+852+3+5+89+8+5+45+7×9×9×9×9×9×9×9×9×9×9×9×8×8×7×9×9×7×7×87×7×8×7×7×8×7×7×8
lấy số nào cộng lại ra 10 rồi nhân
bài 1, tìm x , biết
a, [-10]:x-4.[-5]=[-2].[-11]
b, -7.[-2]^3=[-4]^2.[-5]
c, 40:x=[-3].4+3^3
d, x:{[-5].4-3.2}=[-13].7-[-9].8
bài 2, thực hiện phép tính
a, [-4]^3.[-5]-7.[-8]
b, [-9].6-5.[-4]+[-3]^2.5
c, [-1]^201.7+[-1]^200.9
d, 47.[-15]-15.21+32.[-15]
giải chi tiết giúp mk nha
a)
5 .2 mũ 13 . 4 mũ 11-16 mũ 9
(3.2 mũ 17)mũ2
b) 7.2 mũ 13 -4 mũ 7-10. 8 mũ 4