题目内容
39+48+52+161
6360-360×8
2046÷3-48
96×4÷8
1080+2856÷6
1008÷7÷6
解:(1)39+48+52+161,
=(39+161)+(48+52),
=200+100,
=300;
(2)6360-360×8,
=6360-2880,
=3480;
(3)2046÷3-48,
=682-48,
=634;
(4)96×4÷8,
=384÷8,
=48;
(5)1080+2856÷6,
=1080+476,
=1556;
(6)1008÷7÷6,
=144÷6,
=24.
分析:(1)运用加法交换律和结合律简算;
(2)先算乘法,再算减法;
(3)先算除法,再算减法;
(4)按照从左到右的顺序计算;
(5)先算除法,再算加法;
(6)按照从左到右的顺序计算.
点评:本题考查了四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.
=(39+161)+(48+52),
=200+100,
=300;
(2)6360-360×8,
=6360-2880,
=3480;
(3)2046÷3-48,
=682-48,
=634;
(4)96×4÷8,
=384÷8,
=48;
(5)1080+2856÷6,
=1080+476,
=1556;
(6)1008÷7÷6,
=144÷6,
=24.
分析:(1)运用加法交换律和结合律简算;
(2)先算乘法,再算减法;
(3)先算除法,再算减法;
(4)按照从左到右的顺序计算;
(5)先算除法,再算加法;
(6)按照从左到右的顺序计算.
点评:本题考查了四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算定律进行简便计算.
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