Ôn tập toán 7
Các câu hỏi tương tự
Thực hiện phép tính:
\(\frac{2^{16}.27^3+15.4^9.9^4}{6^9.2^{10}+12^{10}}\)
a) \(\frac{2^{19}.2^{27}+15.4^9.9^4}{6^9.2^{10}+12^{10}}\)
b) \(\frac{\left(-\frac{1}{2}\right)^3-\left(\frac{3}{4}\right)^3-\left(-2\right)^2}{2.\left(-1\right)^5+\left(\frac{3}{4}\right)^2-\frac{3}{8}}\)
Rút gọn
1, So sánh A và B, biết :
A=\(\dfrac{2^{19}.27^3.15.4^9.9^4}{6^9.2^{10}+12^{10}}\)
B=\(\dfrac{4}{35}+\dfrac{4}{63}+\dfrac{4}{99}+\dfrac{4}{143}+\dfrac{4}{195}\)
Tính nhanh
\(\frac{4^6.3^4.9^5}{6^{12}}\)
\(\frac{3^{10}.11+9^5.5}{3^9.2^4}\)
2100-299-298-..-22-2
38:36+(22)4:29
Thực hiện phép tính ( bằng cách nếu có thể )
a, -7/2 + 3/4 - 17/12
b, -1/12 - ( 21/8 - 1/3 )
c, -5/6 - ( -3/8 + 1/10 )
d, 1/2 + 3/2 . ( 5/6 )
e, 1/2 + ( -2/9 ) . 3
Tính :
\(B=\frac{7}{4}\left(\frac{33}{12}+\frac{3333}{2020}+\frac{333333}{303030}+\frac{33333333}{42424242}\right)\)
\(C=\frac{\left(13\frac{1}{4}-2\frac{5}{27}-10\frac{5}{6}\right).230\frac{1}{25}+46\frac{3}{4}}{\left(1\frac{3}{7}+\frac{10}{3}\right):\left(12\frac{1}{3}-14\frac{2}{7}\right)}\)
hepl me
\(\dfrac{1+3^4+3^8+3^{12}}{1+3^2+3^4+3^6+3^83+3^{10}+3^{12}+3^{14}}\)
1/4 × 2/6 × 3/8 × 4/10 × 5/12.......30/62 × 61/64 = 2x
tính :
a) \(\frac{4}{9}:\frac{-1}{7}+6\frac{5}{9}:\frac{-1}{7}\)
b) \(\left(2\frac{1}{3}+3\frac{1}{2}\right):\left(-4\frac{1}{6}+3\frac{1}{7}\right)+7\frac{1}{2}\)
c) \(\frac{\left(13\frac{1}{4}-2\frac{5}{27}-10\frac{5}{6}\right).230\frac{1}{25}+46\frac{3}{4}}{\left(1\frac{3}{7}+\frac{10}{3}\right):\left(12\frac{1}{3}-14\frac{2}{7}\right)}\)