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用简便方法计算0.33×0.5×46.3×2.3+7.7×6.31.25×0.9×0.85.8×100.1.
题目详情
用简便方法计算
0.33×0.5×4 | 6.3×2.3+7.7×6.3 | 1.25×0.9×0.8 | 5.8×100.1. |
▼优质解答
答案和解析
①0.33×0.5×4,
=0.33×(0.5×4),
=0.33×2,
=0.66;
②6.3×2.3+7.7×6.3,
=6.3×(2.3+7.7),
=6.3×10,
=63;
③1.25×0.9×0.8,
=(1.25×0.8)×0.9,
=1×0.9,
=0.9;
④5.8×100.1,
=5.8×(100+0.1),
=580+0.58,
=580.58.
=0.33×(0.5×4),
=0.33×2,
=0.66;
②6.3×2.3+7.7×6.3,
=6.3×(2.3+7.7),
=6.3×10,
=63;
③1.25×0.9×0.8,
=(1.25×0.8)×0.9,
=1×0.9,
=0.9;
④5.8×100.1,
=5.8×(100+0.1),
=580+0.58,
=580.58.
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