用你喜欢的方法计算. 19.2÷2.4×3.2 12.5×0.32×0.5 14.3÷1.1-1.8 3.2×2.4+32×0.76.
问题描述:
用你喜欢的方法计算. 19.2÷2.4×3.2 |
12.5×0.32×0.5 |
14.3÷1.1-1.8 | 3.2×2.4+32×0.76. |
答
(1)19.2÷2.4×3.2,
=8×3.2,
=25.6;
(2)12.5×0.32×0.5,
=12.5×(0.4×0.8)×0.5,
=(12.5×0.8)×(0.4×0.5),
=10×0.2,
=2;
(3)14.3÷1.1-1.8,
=13-1.8,
=11.2;
(4)3.2×2.4+32×0.76,
=3.2×2.4+3.2×7.6,
=3.2×(2.4+7.6),
=3.2×10,
=32.