递等式计算: 420÷60×154= 774÷(27+16)= (45-26)×33= 230-735÷35= 148-
1个回答

解题思路:(1)按照从左到右的顺序计算;

(2)先算小括号里面的加法,再算括号外的除法;

(3)先算小括号里面的减法,再算括号外的乘法;

(4)先算除法,再算减法;

(5)先算乘法,再算减法;

(6)先算小括号里面的加法,再算括号外的减法.

(1)420÷60×154,

=7×154,

=1078;

(2)774÷(27+16),

=774÷43,

=18;

(3)(45-26)×33,

=19×33,

=627;

(4)230-735÷35,

=230-21,

=209;

(5)148-48×2,

=148-96,

=52;

(6)181-(109+43),

=181-152,

=29.

点评:

本题考点: 整数四则混合运算.

考点点评: 解决本题先理清楚运算顺序,然后根据运算顺序逐步求解即可.