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= 1.500 x 2
= 3.000
2. 198 x 416 = n x 198
n = 416
sifat komutatif perkalian
3. 300 x n = (250 x 8 ) + (50 x 8)
n = 8
sifat distributif perkalian terhadap penjumlahan
4. 420 + 75 x 13
= 420 + 975
= 1.395
5. faktorisasi prima :
a. 128 = 2³ x 2⁴
b. 96 = 2² x 2³ x 3
c. 180 = 2² x 3² x 5