用简便方法进行计算. 1.25×3.9×2.4 0.88×9

用简便方法进行计算. 1.25×3.9×2.4 0.88×99+0.88 0.98-0.036-0.264.
2025-03-19 01:04:17
推荐回答(1个)
回答1:

(1)1.25×3.9×2.4
=1.25×0.8×(3×3.9)
=1×11.7
=11.7;

(2)0.88×99+0.88
=0.88×(99+1)
=0.88×100
=88;

(2)0.98-0.036-0.264
=0.98-(0.036+0.264)
=0.98-0.3
=0.68.