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5. cari dulu fpb dari 70,28 dan 42faktorisasi primanya
70 = 2x5x7
28 = 2x2x7
42 = 2x3x7
FPB = 2 x 7 = 14
kelereng merah setiap orang
= 70 : 14 = 5
kelereng biru setiap orang
= 28 : 14 = 2
kelereng hijau setiap orang
= 42 : 14 = 3
jawabannya b.
7. √900-59 - √676
= √841 - √676
= 29 - 26
= 3
jawabannya d.