题目内容
脱式计算. 32.34÷2.1÷0.14 |
(6-3.38)×1.5+3.7 |
73.5÷7×(4-3.44) | 8.54÷0.7-2.6÷0.4. |
分析:(1)从左往右依次运算;
(2)先算括号内的,再算乘法,最后算加法;
(3)先算括号内的,再算除法和乘法;
(4)先算除法,再算减法.
(2)先算括号内的,再算乘法,最后算加法;
(3)先算括号内的,再算除法和乘法;
(4)先算除法,再算减法.
解答:解:(1)32.34÷2.1÷0.14,
=15.4÷0.14,
=110;
(2)(6-3.38)×1.5+3.7,
=2.62×1.5+3.7,
=3.93+3.7,
=7.63;
(3)73.5÷7×(4-3.44),
=10.5×0.56,
=5.88;
(4)8.54÷0.7-2.6÷0.4,
=12.2-6.5,
=5.7.
=15.4÷0.14,
=110;
(2)(6-3.38)×1.5+3.7,
=2.62×1.5+3.7,
=3.93+3.7,
=7.63;
(3)73.5÷7×(4-3.44),
=10.5×0.56,
=5.88;
(4)8.54÷0.7-2.6÷0.4,
=12.2-6.5,
=5.7.
点评:考此题查了小数的四则混合运算,注意运算顺序和运算法则.
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