Belajar Matematika Online

IXL Math On IXL, math is more than just numbers. With unlimited questions, engaging item types, and real-world scenarios, IXL helps learners experience math at its most mesmerizing! Pre-K skills Represent numbers - up to 5 Inside and outside Classify shapes by color Long and short Wide and narrow See all 77 pre-K skills Kindergarten skills Fewer, more, and same Read clocks and write times Seasons Count money - pennies through dimes Shapes of everyday objects I See all 182 kindergarten skills First-grade skills Counting tens and ones - up to 99 Hundred chart Subtraction facts - numbers up to 10 Read a thermometer Measure using an inch ruler See all 210 first-grade skills Second-grade skills Counting patterns - up to 1,000 Greatest and least - word problems - up to 1,000 Compare clocks Create pictographs II Which customary unit of volume is appropriate? See all 287 second-grade skills Third-grade skills Convert between standard and expanded form Count equal groups Estimate sums Show fractions: area models Find equivalent fractions using area models See all 384 third-grade skills Fourth-grade skills Addition: fill in the missing digits Divide larger numbers by 1-digit numbers: complete the table Objects on a coordinate plane Circle graphs Place values in decimal numbers See all 340 fourth-grade skills Fifth-grade skills Least common multiple Multiply fractions by whole numbers: word problems Sale prices Find start and end times: word problems Parts of a circle See all 347 fifth-grade skills Sixth-grade skills Compare temperatures above and below zero Which is the better coupon? 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Certain concepts that are notoriously difficult to master, such as fractions and the basics of algebra, persist throughout high school courses, and if not mastered upon introduction, can hinder a student’s ability to learn new concepts in later courses. Even students confident in their math skills eventually find a course or concept incomprehensible as they reach advanced math classes. In other words, no matter what your age or ability, everyone eventually needs help with math. Varsity Tutors offers resources like free Math Diagnostic Tests to help with your self-paced study, or you may want to consider a Math tutor. Varsity Tutors is happy to offer free practice tests for all levels of math education. Students can take any one of hundreds of our tests that range from basic arithmetic to calculus. These tests are conveniently organized by course name (e.g. Algebra 1, Geometry, etc.) and concept (e.g. “How to graph a function”). 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Trik menghilangkan Virus di Laptop



Memang agak sulit apabila komputer kita sudah terinfeksi virus apalagi biasanya virus itu menginfeksi sekaligus menonaktifkan bagian yang sulit untuk diperbaiki terutama pada registry yang di-disable oleh virus. Misalnya System restore (tidak bisa mengakses Restore), Shutdown (tidak bisa shutdown), Hidden Folders (tidak bisa buka file yang di-Hidden).Melindungi komputer anda dari serangan virus semakin sulit setiap harinya. Tidak saja pihak produsen software antivirus yang terus inovatif memerangi virus, pihak pengembang virus juga tidak mau kalah selalu menaikkan kecerdasan virus buatannya melumpuhkan sasaran. Bahkan perusahaan raksasa sekelas Microsoft dengan tingkat pengamanannya pernah terganggu dengan ulah virus kecil yang menyusup di tahun 2000-an.
Berikut beberapa tips dan trik cara menghapus virus di laptop Anda.

Cara menghapus virus paling mudah dari laptop Anda adalah dengan meng-install sebuah program antivirus. Ada banyak perusahaan yang menawarkan program ini. Setelah memiliki antivirus, Anda perlu melakukan scan atau pemindaian awal untuk mendeteksi virus dan jika ditemukan, maka harus segera dihapus. Dan alangkah baiknya apabila Anda menyatukan antivirus luar dengan antivirus lokal. Saat ini virus-virus lokal sudah banyak beredar di sekitar kita. Jika dengan cara scan antivirus ini tidak berhasil, jangan khawatir karena masih ada banyak cara untuk menaklukkan para virus ini.

Bila Anda merasakan laptop yang Anda miliki sudah terkena virus seperti virus Trojan, dan gangguan spyware yang biasanya dengan indikasi ada tampilan yang tidak biasa pada desktop, program yang berjalan lambat dan lainnya, cara yang dapat dilakukan untuk pertama kali adalah menghapus virus dengan Command Windows, yaitu dengan cara mematikan virus di memori. Cara ini dapat dilakukan dengan menekan tombol ‘Ctrl+Alt+Del’ untuk menampilan Windows Task Manager. Setelah Windows Task Manager terbuka, masuk ke bagian Processes, kemudian klik User Name untuk mengurutkan file yang diproses pada memori. Setelah itu, lihat ada bagian yang mencurigakan atau tidak.

Bila banyak bagian loading pada memori, sebaiknya dimatikan dahulu startup yang otomatis ter-loading. Loading virus ke memori biasanya berupa ‘EXE file’. Langkah ini untuk mencegah virus menyebar terlebih dahulu lewat memori kita. Matikan semua file ‘EXE’ yang loading di memori berdasarkan User Name. Jangan mematikan file dengan kategori System, Local Service, dan Network Service, karena bisa membuat sistem laptop Anda mengalami gangguan atau Freeze.

Cara menghapus virus berikutnya, Anda dapat menonaktifkan virus di startup. Untuk menon-aktifkan virus agar tidak ter-loading ke memori, Anda harus menghentikannya di startup. Caranya dengan menggunakan perintah ‘msconfig’ dengan cara klik menu Stаrt>Run> msconfig. Atau bisa juga dengan cara menekan Windows+R. Setelah itu akan tampil System Configuration Utility. Lalu pilihlah Startup, dalam hal ini, jika Anda tidak mengerti mana proses loading virus atau bukan, sebaiknya pilih Disable AƖƖ.

Tahap berikutnya dalam cara menghapus virus, Anda harus menghapus file virus dari laptop. Carilah dengan menggunakan fasilitas search pada perangkat Windows dengan cara klik menu Stаrt>Search, lalu carilah file ‘EXE’ virus yang sebelumnya loading di memori atau startup. File ini biasanya disimpan oleh pembuatnya di bagian folder Windows atau System32 dari Windows. Setelah ditemukan, delete atau hapus file tersebut.

Tahap terakhir, hapus virus dari System Registry Anda. Anda harus menggunakan perintah ‘REGEDIT’ untuk mengubah dan menghapus virus dari registry Anda. Caranya dengan masuk ke Stаrt>Rυn>regedit. Lalu ke menu Edit pilihlah Find (atau tekan Ctrl+F). Masukkan nama file virus yang ingin Anda hapus (contoh: virus.exe), lalu pilih Find Next. Apabila ditemukan file virus, hapuslah semua registry yang memuat virus tersebut. Kemudian lanjutkan dengan menekan tombol ‘F3’ atau di menu pilih Edit terus Find Next. Biasanya file virus diletakkan pada beberapa tempat di registry. Jadi pastikan Anda menghapus semuanya sampai bersih, dalam arti registry laptop bebas dari loading virus tersebut.

Jika Anda belum berhasil menghapus virus-virus tersebut dari laptop Anda, cara menghapus virus berikutnya yaitu dengan memakai bantuan program lain. Ada beberapa program yang sangat berguna bagi Anda untuk mempermudah menghapus virus. Di antaranya CProcess, Hijack This, Ccleaner, dan antivirus lain buatan luar dan lokal. Namun, jika virus sudah masuk sangat dalam ke sistem laptop Anda dan sudah memblokir akses dalam menjalankan laptop, virus akan menyebabkan hilangnya menu Run dalam start editor. Hilangnya menu Regedit (Registry Editor), Windows Task Manager tidak bisa dibuka, maka Anda harus melakukan cara-cara seperti berikut.

Jika menu Run pada start menu Anda hilang, langkah yang harus dilakukan adalah masuk ke menu Registry Editor. Caranya dengan klik menu edit>find >lalu Anda ketik : NoRun>klik find > bila sudah ketemu ubah Value data dari 1 menjadi 0. Sedangkan jika menu Registry Editor hilang, maka Anda harus mengembalikan kembali program tersebut. Caranya dengan menggunakan program atau software yang dapat membantu Anda yaitu Registry Fix. Jalankan program Registry Fix tersebut dan restart laptop Anda. Jika Anda mengalami masalah dengan tidak terbukanya Windows Task Manager, cara yang dapat Anda lakukan yaitu masuk ke menu Regedit>klik menu find> lalu Anda ketik : DisableTaskMgr> setelah itu Anda klik find lagi. Bila sudah, ubah Value datanya dari 1 menjadi 0.

Itulah beberapa cara menghapus virus di perangkat laptop Anda. Ada baiknya jika Anda mencegah penularan virus agar data-data di dalam laptop tidak rusak atau hilang. Pemakaian antivirus luar dan lokal sangat direkomendasikan. Selain itu Anda juga wajib untuk meng-update antivirus agar database dari antivirus mampu mengenali dan memusnahkan virus yang masuk ke laptop Anda.

Semoga cara diAtas dapat bermanpaat Buat kita semua....!!!

Sumber : http://portal.paseban.com

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