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脱式计算、能简算的要简算:49÷[45-(15+13)]815×56×4956÷23÷5656×78+56×18(0.75-316)×(29+13)(79+527)×54.
题目详情
脱式计算、能简算的要简算:
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(0.75-
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▼优质解答
答案和解析
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问题解析 问题解析
(1)先算小括号里面的加法,再算中括号里面的减法,然后算括号外的除法;
(2)按照从左到右的顺序计算;
(3)先把除法变成乘法,运用乘法交换律简算;
(4)(6)运用乘法分配律简算;
(5)先同时运算小括号里面的减法和加法,再算括号外的乘法. (1)先算小括号里面的加法,再算中括号里面的减法,然后算括号外的除法;
(2)按照从左到右的顺序计算;
(3)先把除法变成乘法,运用乘法交换律简算;
(4)(6)运用乘法分配律简算;
(5)先同时运算小括号里面的减法和加法,再算括号外的乘法.名师点评 名师点评
本题考点: 本题考点:
分数的四则混合运算;分数的简便计算. 分数的四则混合运算;分数的简便计算.
考点点评: 考点点评:
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. 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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16 |
81 |
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作业帮用户
2017-10-14
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作业帮用户作业帮用户
2017-10-142017-10-14
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- 问题解析
- (1)先算小括号里面的加法,再算中括号里面的减法,然后算括号外的除法;
(2)按照从左到右的顺序计算;
(3)先把除法变成乘法,运用乘法交换律简算;
(4)(6)运用乘法分配律简算;
(5)先同时运算小括号里面的减法和加法,再算括号外的乘法.
(2)按照从左到右的顺序计算;
(3)先把除法变成乘法,运用乘法交换律简算;
(4)(6)运用乘法分配律简算;
(5)先同时运算小括号里面的减法和加法,再算括号外的乘法.
(2)按照从左到右的顺序计算;
(3)先把除法变成乘法,运用乘法交换律简算;
(4)(6)运用乘法分配律简算;
(5)先同时运算小括号里面的减法和加法,再算括号外的乘法.
- 名师点评
-
- 本题考点:
- 分数的四则混合运算;分数的简便计算.
-
- 考点点评:
- 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.
- 本题考点:
- 分数的四则混合运算;分数的简便计算.
- 本题考点:
- 分数的四则混合运算;分数的简便计算.
- 考点点评:
- 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.
- 考点点评:
- 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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