1. thực hiện phép tính
B= 535.(0,5)2+(85−25%):414535.(0,5)2+(85−25%):414
2.tính nhanh
a.219.1425−219.525219.1425−219.525 b) -1,7 .2,3.+1,7+(-3,7)-1,7 .3-0,17:0,1
3. tìm x
a) x-30% x=1212 b)(312+2x):157=213
giúp mình với . mai mình phải kiểm tra rồi
\(x+12=36\)
\(x=36-12\)
\(x=24\)
1. thực hiện phép tính
B= \(5\frac{3}{5}.\left(0,5\right)^2+\left(\frac{8}{5}-25\%\right):4\frac{1}{4}\)
2.tính nhanh
a.\(2\frac{1}{9}.14\frac{2}{5}-2\frac{1}{9}.5\frac{2}{5}\) b) -1,7 .2,3.+1,7+(-3,7)-1,7 .3-0,17:0,1
3. tìm x
a) x-30% x=\(\frac{1}{2}\) b)\(\left(3\frac{1}{2}+2x\right):1\frac{5}{7}=2\frac{1}{3}\)
1. thực hiện phép tính
a) \(\frac{-1}{2}-\frac{9}{8}:0,75\) b)\(\frac{4}{3}.\frac{11}{15}+\frac{4}{15}.\frac{4}{3}-2\frac{1}{3}\) c)\(\frac{6}{8}+\frac{6}{56}+\frac{6}{140}+.....+\frac{6}{416}\)
2. tìm x
a) x ∈ Z, x∈ Ư (4) và x ∠1 b)x - \(\frac{2}{3}\)=20 % c) \((2\frac{1}{6}-x):\frac{2}{3}=\left(-\frac{1}{2}\right)^2\)
I. give the correct froms or tenses of verb
2. I ..........( study ) here for more than three years
3. what a nice dress ! Where ..........(you / buy) ?
4. don't forget to take your umbrella . It ..........(rain)
6. Our class ............(organise ) a writing contest . We have to write about the environment
7.give old clothes to charity instead of ..............(throw) them away
8. encouraging people .............(use) pulic transport is a great way to reduce traffic jams
10. .........................(use/ever/meet) a famous football player ?
13 . I..............(show ) you the garden when it stops rainning
21.nga prefer (take) ..........................part in sport to (watch )........................them
23. they ................(be ) to London many times this year
24 .(not throw).................trash in the school yard .put it in the rubbish bins.