题目内容
(1)5.425+4.575=
(2)67-48=
(3)36÷2=
(4)7.2÷0.04=
(5)6÷=
(6)42×=
(7)=
(8)=
(9)=
(10)=
解:(1)5.425+4.575=10;
(2)67-48=19;
(3)36÷2=18;
(4)7.2÷0.04=180;
(5)6÷,
=6,
=;
(6)42×,
=42×-42×+42×,
=21-7+14,
=28;
(7),
=3+5-7,
=9-7,
=1;
(8),
=(7-2)+(+2),
=5+3,
=8;
(9),
=3×××3,
=(3×)×(×3),
=8×8,
=64;
(10)73×0.6+26×60%+,
=(73+26+1)×0.6,
=100×0.6,
=60.
分析:(1)(2)(3)(4)高年级运算法则求解;
(5)先算小括号里面的加法,再算括号外的除法;
(6)运用乘法分配律简算;
(7)先去括号,再运用加法交换律;
(8)运用加法交换律和加法结合律简算;
(9)先把除法变成乘法,再运用乘法结合律简算;
(10)运用乘法分配律简算.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
(2)67-48=19;
(3)36÷2=18;
(4)7.2÷0.04=180;
(5)6÷,
=6,
=;
(6)42×,
=42×-42×+42×,
=21-7+14,
=28;
(7),
=3+5-7,
=9-7,
=1;
(8),
=(7-2)+(+2),
=5+3,
=8;
(9),
=3×××3,
=(3×)×(×3),
=8×8,
=64;
(10)73×0.6+26×60%+,
=(73+26+1)×0.6,
=100×0.6,
=60.
分析:(1)(2)(3)(4)高年级运算法则求解;
(5)先算小括号里面的加法,再算括号外的除法;
(6)运用乘法分配律简算;
(7)先去括号,再运用加法交换律;
(8)运用加法交换律和加法结合律简算;
(9)先把除法变成乘法,再运用乘法结合律简算;
(10)运用乘法分配律简算.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
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