问题
解答题
用简便方法计算
|
答案
(1)4.8×0.25,
=1.2×(4×0.25),
=1.2×1,
=1.2;
(2)2.33×0.5×4,
=2.33×(0.5×4),
=2.33×2,
=4.66;
(3)1.2×2.5+0.8×2.5,
=(1.2+0.8)×2.5,
=2×2.5,
=5;
(4)3.7÷1.25÷8.
=3.7÷(1.25×8),
=3.7÷10,
=0.37.
用简便方法计算
|
(1)4.8×0.25,
=1.2×(4×0.25),
=1.2×1,
=1.2;
(2)2.33×0.5×4,
=2.33×(0.5×4),
=2.33×2,
=4.66;
(3)1.2×2.5+0.8×2.5,
=(1.2+0.8)×2.5,
=2×2.5,
=5;
(4)3.7÷1.25÷8.
=3.7÷(1.25×8),
=3.7÷10,
=0.37.