EXERCISES IN MENTAL COMPUTATION AND
NUMBER SENSE
FOR PRIMARY SCHOOL CHILDREN
(RECOMMENDED FOR AGES 8-9 / YEAR 2 AND YEAR 3)
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Pendahuluan
Laman web ini menghidangkan latihan-latihan matematik yang menggunakan kaedah mental computation dan kepekaan nombor atau number sense. Ia dibangunkan sebagai tambahan kepada penggunaan permainan kad matematik My Rummy.Laman ini menyediakan sokongan dalam bentuk latihan-latihan matematik peringkat asas bagi murid sekolah rendah berumur 8 hingga 9 tahun. Jika di Malaysia, latihan-latihan matematik ini adalah untuk murid-murid sekolah rendah tahun 2 dan 3. Latihan-latihan matematik ini sepenuhnya melibatkan pengiraan matematik menggunakan teknik mental computation dan number sense. Ini bermakna, murid-murid hendaklah melakukan semua pengiraan dan latihan mantematik ini tanpa menggunakan kertas dan pensil! Latihan-latihan matematik tersebut akan menerangkan beberapa kaedah untuk membuat operasi penambahan keatas angka-angka bernilai besar (lebih daripada 10) dengan cara yang lebih mudah. Sila lihat Jadual kandungan di bawah untuk senarai latihan matematik yang disediakan. Adalah diharapkan anda dapat memanfaatkan latihan-latihan matematik yang disediakan.My-Rummy TeamH I G H L I G H T S Have Fun With Lipo Dapatkan CD interaktif pembelajaran bahasa Inggeris termurah di pasaran sekarang!
Belajar dan berlatih teknik aritmetik mental dengan buku kerja abakus Tahun 1 dan 2.
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TABLE OF CONTENTS:Addition Strategies
- Work Out 1: Use a known fact - multiple of 10.
- Work Out 2: Count on - multiples of 10 and any number.
- Work Out 3: Use doubles - with/without regrouping.
- Work Out 4: Add the parts - no regrouping.
- Work Out 5: Use place value - regrouping.
- Work Out 6: Make a ten - adding two-digit numbers.
- Work Out 7: Round or adjust - rounding one addend.
- Work Out 8: Use Compatible pairs - four addends
Subtraction Strategies Mind Challenger
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How to use this web exercises...
The activities within each book have been developmentally sequenced. This allows teachers to work through the book from the front to the back cover. Alternatively, a confident teacher may want to develop his or her own sequence by drawing on related activities from the different sections of the page. For example, after completing the doubling activities for addition, the teacher may want to focus on the idea of using related doubles to subtract.
The students should be 'walked' through the activity on the pages and encourages to share their strategies and methods of computation.
Work Out page can sharpen student's mental skill. Ask them to complete all of the pages. This can be done in school time or as set homework. It is important to correct this page as a class. This will give the students further opportunities to share their strategies and to explain their thinking.
Assessment
It is important to know how confident and competent students are at using a particular strategy. This information can be used to judge whether they need further experiences with that strategy, or if they are ready to progress to the next strategy.
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