题目内容
计算下列各题,能简便计算的要简便计算.
25×3.2×125 | 6.9×101-69×0.1 | 36.3+26.44+13.7+3.56 |
264×96+8×132 | 3000÷125÷8 | 36.36-(6.36+7.2) |
考点:整数四则混合运算,运算定律与简便运算,小数四则混合运算
专题:运算顺序及法则,运算定律及简算
分析:(1)把3.2拆分为4×0.8,然后根据乘法的结合律简算;
(2)(4)根据乘法的分配律简算;
(3)根据加法的交换律与结合律简算;
(5)根据除法的性质简算;
(6)根据减法的性质简算.
(2)(4)根据乘法的分配律简算;
(3)根据加法的交换律与结合律简算;
(5)根据除法的性质简算;
(6)根据减法的性质简算.
解答:
解:(1)25×3.2×125
=(25×0.4)×(8×125)
=10×1000
=10000
(2)6.9×101-69×0.1
=6.9×101-6.9×1
=6.9×(101-1)
=6.9×100
=690
(3)36.3+26.44+13.7+3.56
=(36.3+13.7)+(26.44+3.56)
=50+30
=80
(4)264×96+8×132
=264×96+(4×2)×132
=264×96+4×264
=264×(96+4)
=264×100
=26400
(5)3000÷125÷8
=3000÷(125×8)
=3000÷1000
=3
(6)36.36-(6.36+7.2)
=36.36-6.36-7.2
=30-7.2
=22.8
=(25×0.4)×(8×125)
=10×1000
=10000
(2)6.9×101-69×0.1
=6.9×101-6.9×1
=6.9×(101-1)
=6.9×100
=690
(3)36.3+26.44+13.7+3.56
=(36.3+13.7)+(26.44+3.56)
=50+30
=80
(4)264×96+8×132
=264×96+(4×2)×132
=264×96+4×264
=264×(96+4)
=264×100
=26400
(5)3000÷125÷8
=3000÷(125×8)
=3000÷1000
=3
(6)36.36-(6.36+7.2)
=36.36-6.36-7.2
=30-7.2
=22.8
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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