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

7
12
×3
3
5
÷39
7
12
+3.6×5
5
8
+0.36×33.75)=______.

0.1÷0.001-(39

7
12
×3
3
5
÷39
7
12
+3.6×5
5
8
+0.36×33.75),
=100-(39
7
12
÷39
7
12
×3.6+3.6×5
5
8
+0.36×33.75),
=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
7
12
÷39
7
12
×3.6+3.6×5
5
8
+0.36×33.75),然后把分数变为小数,运用乘法分配律简算.
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.