北师大四年级数学下册小数乘法简便计算76947教学提纲.doc

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1、四年级下册小数练习题一、脱式计算，能简算的要简算。7.8×1.3+0.948-1.8×240.25×0.46×0.42.5×1.3+0.93.8×41-3.8（4+0.4）×2.50.27×3.8+0.27×6.22.9×100.127.5×101-27.540×0.63×0.253.62×25.7+3.62×74.30.25×4.87×418.8+23.6+26.410.95-3.74-4.2695.59-（9.59+12.78）25.6-(0.23+5.6)-1.7713.75-(4.75+6.48)7.83+2.34-0.

2、83+6.663.82+2.9+0.18+9.15.93+0.19+2.8125.48-((9.4-0.52)3.07-0.38-1.6235.6-1.8-15.6-7.27.3+2.7-7.3+2.748.4+2.78+51.6-0.7823.4+0.8-13.4-7.24.8+8.63+5.2+0.373.25+2.76+1.751.27+3.9+0.73+15.15.84-1.8-3.2132.44-(58.74+19.44)7.5+4.8-6.57.14-0.53-2.4713.75-(3.75+6.48)13.45-4

3、.68+2.5547.8-7.45+8.236.8-4.5+6.9849.8-9.6+8.815.2-6.8-3.451.76+0.65+3.240.134+2.66+0.87.5+4.9-6.33.45+1.79+0.654.85+8.63+0.371.76+3.44+0.3536.54-1.76-8.668-2.45-1.0223.4+3.4-0.236.02+3.6+1.983.07-0.38-1.627.5+4.9-6.536.8-3.9-6.883.285+1.79+0.5923.4-0.8+13.432+4.9-8.

4、61.29+3.7+2.715.93+0.49+2.069-2.45-1.6521+0.56+11.364.89-7.88-13.6二、能简便的要简便计算。12.5×8.2×80.23×1.4＋0.23×8.60.125×（80＋0.8）0.4×0.16×2.55.6×1017.85×991.15×99＋1.1516.2×101－16.245×0.78＋5.5×7.82.8+7.2×0.81   0.34×2.5×0.4  1.25×11×4×0.8 8.93×5.7＋8.93×3.3＋8.93 4.82×102  0.7×0.

5、46+0.7×0.54 5.6-4.34+7.34685.7-（15.3-4.8）25.4-（15.3+7.7）3.6－1.28＋3.093.8-0.46-1.72325.6-(0.23+5.6)-1.77   13.75-(4.75+6.48) 7.83+2.34-0.83+6.66  3.82+2.9+0.18+9.125.48-((9.4-0.52)  35.6-1.8-15.6-7.2  5.93+0.19+2.817.3+2.7-7.3+2.7  3+5.2+0.37  3.07-0.38-1.62 48.4+2.78

6、+51.6-0.78  23.4+0.8-13.4-7.2    4.8+8.61.27+3.9+0.73+15.1     5.84-1.8-3.2    132.44-(58.74+19.44)   7.5+4.8-6.5  13.45-4.68+2.553.25+2.76+1.75 13.75-(3.75+6.48)  7.14-0.53-2.47  47.8-7.45+8.2 36.8-4.5+6.98   49.8-9.6+8.8  15.2-6.8-3.453.45+1.79+0.65 3.45+1.79+0.65 

7、1.76+0.65+3.24  0.134+2.66+0.8    7.5+4.9-6.3 4.85+8.63+0.37   1.76+3.44+0.35   36.54-1.76-8.66 3.45+1.79+0.65 7.5+4.9-6.5 23.4+3.4-0.23   6.02+3.6+1.98   3.07-0.38-1.62  36.8-3.9-6.88   3.285+1.79+0.59    23.4-0.8+13.4 1.29+3.7+2.7121+0.56+11.332+4.9-8.65.93+0.49+2.

8、06         9-2.45-1.65       一、乘法交换律0.25×8.5×4  12.5×0.96×0.8     0.25×0.73×4  0.25×16.2×4 二乘法结合律4.36×12.5×8   0.95×0.25×435×0.2×0.