小数脱式计算电子教案.doc

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1、小数脱式计算精品文档（一）小数加减法计算3.2＋0.36＋4.8＋1.64         0.456＋6.22＋3.78        6.9＋4.8＋3.1 1.29＋3.7＋2.71＋6.3         0.398+0.36+3.64          4.02＋5.4＋0.98 73.8－1.64－13.8－5.36      7.14－0.53－2.47          5.17－1.8－3.235.6－1.8－15.6－7.2        66.86－8.66－1.34         36.8－3.9－6.17.85＋2.

2、34－0.85＋4.66    13.35－4.68＋2.65      9.6＋4.8－3.6 5.27＋2.86－0.66＋1.63    3.68＋7.56－2.68       47.8－7.45+8.8  3.82＋2.9＋0.18＋9.1         1.27+3.9+0.73+16.1       1.57+0.245+7.43 2.64＋8.67＋7.36＋11.33      0.134+2.66+0.866         1.76+0.195+3.2423.4－0.8－13.4－7.2        15.02-6.8

3、-1.02            8－2.45－1.553.25＋1.79－0.59＋1.75    1.23＋3.4－0.23＋6.6        7.5＋4.9－6.5     （二）小数乘除法计算0.25×16.2×4              320÷1.25÷8            3.9÷（1.3×5）3.52÷2.5÷0.4             9.6÷0.8÷0.4           2.5×2.4 3.2×0.25×12.5            15÷（0.15×0.4）       2.7÷45 8.54÷2.5

4、÷0.4             0.25×0.73×4           4.6÷3.5 （二）小数乘除法计算 0.8×（4.3×1.25）         4.36×12.5×8           0.25×0.73×4        320÷1.25÷8               17.8÷(1.78×4)         4.5÷1.8        12.5×0.96×0.8            1.25×2.5×32            4.9÷1.4    0.35×（1.25×2）×0.8      63.4÷2.5÷

5、0.4          0.25×363.2×0.25×12.5             12.5×0.96×0.8           4.2÷3.5       15.2÷0.25÷4              1.25×2.5×32           0.49÷1.4       18－1.8÷0.125÷0.8        930÷0.6÷5             70÷28       2.31×1.6×0.5×1.25             0.25×8.5×4            15÷0.25       5.6÷1

6、.25÷0.8÷2.5÷0.4         0.125×16.2×16小数简便计算练习四 7.09×10.8－0.8×7.09     3.72×3.5＋6.28×3.5    27.5×3.7－7.5×3.7       3.83×4.56＋3.83×5.44    3.9×2.7＋3.9×7.3      7.6×0.8＋0.2×7.6       乘法分配律的运用二 3.14×0.68＋31.4×0.032    32.4×0.09＋0.1×3.24    1.28×8.6＋7.2×86        2.3×16+2.3×22+23

7、×0.2    9.16×15－0.5×91.6      101×0.87-0.91×87    乘法分配律的运用三 28.6×101－28. 6           1.87×9.9＋0.187            58.5×81-8.5      (45.9－32.7)÷8÷0.125       (1.25－0.125)×8       （2.5－0.25）×0.4        乘法分配律的运用四 0.8×100.1                 0.79×199        0.85×1993.65×10.1      4.6

8、×102       0.65×101 7.74×（2.8－1.3）＋1.5×2.26                  46×57＋23×86