Jawabanmu

2014-09-05T18:26:03+07:00
A. (72 ÷ 9) + ((-12) × 6) 
    = 8 + (-72) = -64
b. 12 × (65-20) ÷ 9 + (-18)
    = (12 × 45) ÷ (9 + (-18))
    = 540 ÷ (-9) = -60
2014-09-05T18:28:28+07:00
A.72 : 9 + (-18) = 8 + (-72) = -64 B.62 × 45 : 9 + (-18) = 2790 : 9 + (-18) = 310 + (-18) = 292