计算:0.1÷0.001-(39712×335÷39712+3.6×558+0.36×33.75)=______.
问题描述:
计算:0.1÷0.001-(39
×37 12
÷393 5
+3.6×57 12
+0.36×33.75)=______. 5 8
答
0.1÷0.001-(39
×37 12
÷393 5
+3.6×57 12
+0.36×33.75),5 8
=100-(39
÷397 12
×3.6+3.6×57 12
+0.36×33.75),5 8
=100-(3.6+3.6×5.625+3.6×3.375),
=100-(1+5.625+3.375)×3.6,
=100-10×3.6,
=100-36,
=64;
故答案为:64.
答案解析:根据数字特点,原式变为100-(39
÷397 12
×3.6+3.6×57 12
+0.36×33.75),然后把分数变为小数,运用乘法分配律简算.5 8
考试点:四则混合运算中的巧算.
知识点:完成此题,注意分析式中数据,通过数字转化,运用运算定律灵活简算.