简便计算;68乘98怎么简便

2024-12-17 20:34:16
推荐回答(3个)
回答1:

68 × 98
= 68 × (100 - 2)
= 68 × 100 - 68 × 2
= 6800 - (70 - 2)× 2
= 6800 - 70 × 2 + 2 × 2
= 6800 - 140 + 4
= 6660 + 4
= 6664

回答2:

68(100-2)=6800-136=6664

回答3:

98写成100-2