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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 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 第一关：小试牛刀： 4.820.8+3.180.8 （3.6+7.2）0.36 772.27.8 18.181.8
2、 = = = =（4.82+3.184.82+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 =30=30=30=30 =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 第二关：平稳度过： 283.5 160.25 3.62.4 第三关：过关斩将 15.263.5+9.243.5 150.151.5 7.61.4+6.31.4+2.91.4 6.38+0.125x3.7 32.85+7.25