题目内容
脱式计算
756÷(51-33) | 56+48×13 | 288÷18×4 | 45×(45-27) |
分析:(1)先算小括号里面的减法,再算括号外的除法;
(2)先算乘法,再算加法;
(3)按照从左到右的顺序计算;
(4)先算小括号里面的减法,再算括号外的乘法.
(2)先算乘法,再算加法;
(3)按照从左到右的顺序计算;
(4)先算小括号里面的减法,再算括号外的乘法.
解答:解:(1)756÷(51-33),
=756÷18,
=42;
(2)56+48×13,
=56+624,
=680;
(3)288÷18×4,
=16×14,
=224;
(4)45×(45-27),
=45×18,
=810.
=756÷18,
=42;
(2)56+48×13,
=56+624,
=680;
(3)288÷18×4,
=16×14,
=224;
(4)45×(45-27),
=45×18,
=810.
点评:本题考查了简单的四则混合运算,关键是理清楚运算的顺序,然后根据运算顺序逐步求解即可.
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