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)2.5×1.25×32, =2.5×1.25×4×8, =(2.5×4)×(1.25×8), =10×10, =100; (2)43.72×7.9+2.1×43.72, =43.72×(7.9+2.1), =43.72×10, =437.2; (3)10.7-3.6-5.4, =10.7-(3.6+5.4), =10.7-9, =1.7; (4)1.62÷[(20.4-9.6)×0.3], =1.62÷[10.8×0.3], =1.62÷3.24, =0.5; (5)0.8×[13-(3.12+5.28)], =0.8×[13-8.4], =0.8×4.6, =3.68; (6)4.6+7.82÷(22-19.7), =4.6+7.82÷2.3, =4.6+3.4, =8. |
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