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用简便方法计算.4.37×6.3+4.37×3.72.64÷1.25÷0.810.2×0.45.
题目详情
用简便方法计算.
4.37×6.3+4.37×3.7 | 2.64÷1.25÷0.8 | 10.2×0.45. |
▼优质解答
答案和解析
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.
=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.
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