题目内容
脱式计算 9.3÷0.5÷2.4 |
37.6-1.5÷0.24 |
4.8÷1.2×2.3-9.2 | 1.6÷0.8-0.34. |
分析:(1)运用除法的性质计算;或从左往右依次运算;
(2)(4)先算除法,再算减法;
(3)先算除法和乘法,再算减法.
(2)(4)先算除法,再算减法;
(3)先算除法和乘法,再算减法.
解答:解:(1)9.3÷0.5÷2.4,
=9.3÷(0.5×2.4),
=9.3÷1.2,
=7.75;
(2)37.6-1.5÷0.24,
=37.6-6.25,
=31.35;
(3)4.8÷1.2×2.3-9.2,
=4×2.3-9.2,
=9.2-9.2,
=0;
(4)1.6÷0.8-0.34,
=2-0.34,
=1.66.
=9.3÷(0.5×2.4),
=9.3÷1.2,
=7.75;
(2)37.6-1.5÷0.24,
=37.6-6.25,
=31.35;
(3)4.8÷1.2×2.3-9.2,
=4×2.3-9.2,
=9.2-9.2,
=0;
(4)1.6÷0.8-0.34,
=2-0.34,
=1.66.
点评:脱式计算,特别注意运算顺序和运算法则,考查了学生的运算能力.
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