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1、学习数学你最棒啦!一、速算与巧算 4.53.6 =(4.54.54.54.59)(3.69)=0.5 =0.5 =0.5 =0.5 0.4 =1.25=1.25=1.25=1.25第1页/共6页 12.020.25=(12.02x412.02x412.02x412.02x4)(0.25x4)(0.25x4)(0.25x4)(0.25x4)=48.0848.0848.0848.08 1 1 1 1=48.08=48.08=48.08=48.08第2页/共6页第一关:小试牛刀:4.820.8+3.180.8 (3.6+7.2)0.36 772.27.8 18.181.8=(4.82+3.184.8
2、2+3.184.82+3.184.82+3.18)0.8=10=10=10=10+20=10=10=10=10=3.6=3.6=3.6=3.60.36+7.20.36=3=3=3=30 0 0 0=8=8=8=80.8=(780-7.8780-7.8780-7.8780-7.8)7.8=7807807807807.8-7.87.8=1=1=1=100-100-100-100-1=99=99=99=99 =(18+0.1818+0.1818+0.1818+0.18)1.8=18=18=18=181.8+0.181.8+0.181.8+0.181.8+0.181.8 =10+0.1=10+0.1=10+0.1=10+0.1=10.1=10.1=10.1=10.1第3页/共6页第二关:平稳度过:283.5 160.25 3.62.4第4页/共6页第三关:过关斩将15.263.5+9.243.5 150.151.57.61.4+6.31.4+2.91.4 6.38+0.125x3.7 32.85+7.25第5页/共6页感谢您的观看。第6页/共6页