发布人:繁体字网(www.fantiz5.com) 发布时间:2015-10-24 07:30:00
试题原文 |
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(1)6.71×0.52+4.8×0.671, =6.71×0.52+0.48×6.71, =6.71×(0.52+0.48), =6.71×1, =6.71; (2)2.5×(3.5-1.65)×0.4, =2.5×1.85×0.4, =2.5×0.4×1.85, =1×1.85, =1.85; (3)102×4.5, =(100+2)×4.5, =100×4.5+2×4.5, =450+9, =459; (4)6.25÷1.25÷0.8, =6.25÷(1.25×0.8), =6.25÷1, =6.25; (5)8.3-2.63+2.73×1.5, =8.3-2.63+4.095, =5.67+4.095, =9.765. |
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