题目内容
你能想出简便方法来计算下面各题吗? 72-3×8÷6 |
(450+27)÷(21-18) |
(40+8)×125 | 60-(12.87+0.75) |
95.6-(26.3-8.3) | 32×38+32×62. |
分析:(1)先算乘法,再算除法,最后算减法;
(2)先算加法和减法,再算除法;
(3)根据乘法分配律进行简算;
(4)先算加法,再算减法;
(5)先算小括号里面的减法,再算括号外面的减法;
(6)根据乘法分配律进行简算.
(2)先算加法和减法,再算除法;
(3)根据乘法分配律进行简算;
(4)先算加法,再算减法;
(5)先算小括号里面的减法,再算括号外面的减法;
(6)根据乘法分配律进行简算.
解答:解:(1)72-3×8÷6
=72-24÷6
=72-4
=68;
(2)(450+27)÷(21-18).
=477÷3
=159;
(3)(40+8)×125
=40×125+8×125
=5000+1000
=6000;
(4)60-(12.87+0.75)
=60-13.62
=46.38;
(5)95.6-(26.3-8.3)
=95.6-18
=77.6;
(6)32×38+32×62
=32×(38+62)
=32×100
=3200.
=72-24÷6
=72-4
=68;
(2)(450+27)÷(21-18).
=477÷3
=159;
(3)(40+8)×125
=40×125+8×125
=5000+1000
=6000;
(4)60-(12.87+0.75)
=60-13.62
=46.38;
(5)95.6-(26.3-8.3)
=95.6-18
=77.6;
(6)32×38+32×62
=32×(38+62)
=32×100
=3200.
点评:此题主要考查整数、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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