问题
解答题
用简便方法计算.
(1)0.8×5.64×1.25
(2)7.68×0.4×2.5.
答案
(1)0.8×5.64×1.25
=0.8×1.25×5.64,
=1×5.64,
=5.64.
(2)7.68×0.4×2.5
=7.68×(0.4×2.5),
=7.68×1,
=7.68.
用简便方法计算.
(1)0.8×5.64×1.25
(2)7.68×0.4×2.5.
(1)0.8×5.64×1.25
=0.8×1.25×5.64,
=1×5.64,
=5.64.
(2)7.68×0.4×2.5
=7.68×(0.4×2.5),
=7.68×1,
=7.68.