Matematika Tema 2
Presentation
•
Mathematics
•
2nd Grade
•
Hard
Anonymous Anonymous
FREE Resource
9 Slides • 0 Questions
1
2
ANAK-ANAK MASIH INGAT SOAL PENJUMLAHAN MEMINJAM?
YUK! MARI KITA INGAT LAGI!
BU GURU ADA CONTOH SOAL;
348
237
------+
......
BAGAIMANA MENJAWABNYA?
KITA LIHAT SLIDE SELANJUTNYA! :-)
3
PAKAI CARA PANJANG,
DIPISAHKAN SECARA TEMPATNYA (SATUAN + PULUHAN + SATUAN)
LALU DITAMBAHKAN DARI BELAKANG (DARI SATUAN DULU)
348 = 300 + 40 + 8
237 = 200 + 30 + 7
_____________ +
= 500 + 70 + 15 --> SATUAN ANGKANYA HARUS (1) SEDANGKAN 15 ADA 2
= 500 + 70 + 10 + 5
= 500 + 80 + 5
= 585
4
2. MEMAKAI CARA PENDEK
DIJUMLAHKAN LANGSUNG DARI BELAKANG (DARI ANGKA SATUAN)
1
348 3 4 8
237 2 3 7
--------------- +
5 8 5
5
PENGURANGAN MEMINJAM
6
MARI KITA INGAT LAGI PENGURANGAN MEMINJAM!
572
216
----- -
7
8
2. CARA PENDEK
6
572 5 7 2
216 2 1 6
-------------- -
3 5 6
KENAPA 7 DICORET BU?
-> karena dipinjam 1 untuk bantu angka 2 agar angka 2 menjadi 12 dikurangi bawahnya = 6 , karena jika 2 saja tidak bisa dikurangi 6
9
1. 312 + 179 = ....
2. 436 + 525 = ....
3. 681 - 234 = .....
4. 755 - 136 = .....
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