问题
解答题
用简便方法计算.
|
答案
①4.37×6.3+4.37×3.7,
=4.37×(6.3+3.7),
=4.37×10,
=43.7;
②2.64÷1.25÷0.8,
=2.64÷(1.25×0.8),
=2.64÷1,
=2.64;
③10.2×0.45,
=(10+2)×0.45,
=10×0.45+2×0.45,
=4.5+0.9,
=5.4.
用简便方法计算.
|
①4.37×6.3+4.37×3.7,
=4.37×(6.3+3.7),
=4.37×10,
=43.7;
②2.64÷1.25÷0.8,
=2.64÷(1.25×0.8),
=2.64÷1,
=2.64;
③10.2×0.45,
=(10+2)×0.45,
=10×0.45+2×0.45,
=4.5+0.9,
=5.4.