题目内容
用你喜欢的方法做
6.3÷1.8÷5
(16.8+8.16)÷8
0.4×5÷0.4×5
(7.5-2.3×0.4)÷0.01.
6.3÷1.8÷5
(16.8+8.16)÷8
0.4×5÷0.4×5
(7.5-2.3×0.4)÷0.01.
分析:根据小数的四则混合运算的运算顺序:先算乘除、再算加减,有括号的先算括号的,进行依次计算即可.
解答:解:①6.3÷1.8÷5,
=6.3÷(1.8×5),
=0.7;
②(16.8+8.16)÷8,
=24.96÷8,
=3.12;
③0.4×5÷0.4×5,
=2÷0.4×5,
=25;
④(7.5-2.3×0.4)÷0.01,
=(7.5-0.92)÷0.01,
=6.58÷0.01,
=658.
=6.3÷(1.8×5),
=0.7;
②(16.8+8.16)÷8,
=24.96÷8,
=3.12;
③0.4×5÷0.4×5,
=2÷0.4×5,
=25;
④(7.5-2.3×0.4)÷0.01,
=(7.5-0.92)÷0.01,
=6.58÷0.01,
=658.
点评:此题主要考查小数的四则混合运算的运算顺序和应用运算定律进行简便计算.
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