70 × 2 + 7 × 10
90 × 2 + 1 – 8
70x + 70a + 80z + 79z + 80x + 90a + 100
3! + 2!
Note :
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Quiz
Penyelesaian:
70×2+7×10
=140+70
=210
—————————————-
90×2+1-8
=180+1-8
=181-8
=173
—————————————-
70x+70a+80z+79z+80x+90a+100
=70x+80x+70a+90a+80z+79z+100
=150x+160a+159z+100
—————————————-
3!+2!
=3×2×1+2×1
=6+2
=8