题目内容
脱式计算.
(1.5+8.5÷5)×0.8 | 26.4÷[8×(5.34-3.84)]. |
分析:(1)先算括号内的除法,再算括号内的加法,最后算括号外的乘法;
(2)先算小括号内的,再算中括号内的,最后算括号外的.
(2)先算小括号内的,再算中括号内的,最后算括号外的.
解答:解:(1)(1.5+8.5÷5)×0.8,
=(1.5+1.7)×0.8,
=3.2×0.8,
=2.56;
(2)26.4÷[8×(5.34-3.84)],
=26.4÷[8×1.5],
=26.4÷12,
=2.2.
=(1.5+1.7)×0.8,
=3.2×0.8,
=2.56;
(2)26.4÷[8×(5.34-3.84)],
=26.4÷[8×1.5],
=26.4÷12,
=2.2.
点评:凡是脱式计算,特别应注意运算顺序和运算法则.
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