题目内容
脱式计算.
25×4+360 | (38+82)÷4 | 33+27×3 | 850-250×3. |
分析:(1)先算乘法,再算加法;
(2)先算小括号里面的加法,再算括号外的除法;
(3)先算乘法,再算加法;
(4)先算乘法,再算减法.
(2)先算小括号里面的加法,再算括号外的除法;
(3)先算乘法,再算加法;
(4)先算乘法,再算减法.
解答:解:(1)25×4+360,
=100+360,
=460;
(2)(38+82)÷4,
=120÷4,
=30;
(3)33+27×3,
=33+81,
=114;
(4)850-250×3,
=850-750,
=100.
=100+360,
=460;
(2)(38+82)÷4,
=120÷4,
=30;
(3)33+27×3,
=33+81,
=114;
(4)850-250×3,
=850-750,
=100.
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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