300-(17-18)-(16-17)-(15-16)-(14-15)-(13-14)-(12-13)-(11-12)计算过程

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300-(17-18)-(16-17)-(15-16)-(14-15)-(13-14)-(12-13)-(11-12)计算过程
300-(17-18)-(16-17)-(15-16)-(14-15)-(13-14)-(12-13)-(11-12)计算过程

300-(17-18)-(16-17)-(15-16)-(14-15)-(13-14)-(12-13)-(11-12)计算过程
300-(17-18)-(16-17)-(15-16)-(14-15)-(13-14)-(12-13)-(11-12)
=300-(-1)-(-1)-(-1)-(-1)-(-1)-(-1)-(-1)
=300+7
=307

16、17、18题. 16,17,18 16 17 18 19 16,17,18题 16,17,18题 16,17,18,19 求16 17 18 16 17 18题 16,17,18,19, 16,17,18, 16 17 18 16,17,18选择 16,17,18题, 16 17 18 求16 17 18 ..16 17 18 16、17、18题, 16,17,18,