您现在的位置是:首页 > 学科知识查询 > 小学数学题库

脱式计算.怎样算简便就怎样算. 153÷17+32×6812÷83×29+17×2999×64245-148-52350÷42.

编辑:chaxungu时间:2026-04-26 08:07:20分类:小学数学题库

脱式计算,怎样算简便就怎样算.
153÷17+32×6812÷(532-36×14)83×29+17×29
99×64245-148-52350÷42.
解:(1)153÷17+32×6,
=9+192,
=201;

(2)812÷(532-36×14),
=812÷(532-504),
=812÷28,
=29;

(3)83×29+17×29,
=(83+17)×29,
=100×29,
=2900;

(4)99×64,
=(100-1)×64,
=100×64-1×64,
=6400-64,
=6336;

(5)245-148-52,
=245-(148+52),
=245-200,
=45;

(6)350÷42,
=350÷(7×6),
=350÷7÷6,
=50÷6,
=8
分析:(1)先算除法和乘法,再算加法;
(2)先算乘法,再算减法,最后算除法;
(3)根据乘法分配律进行计算;
(4)根据乘法分配律进行计算;
(5)根据连减的性质进行计算;
(6)根据连除的性质进行计算.
点评:四则运算,先弄清运算顺序,然后再进一步计算,能简算的要简算.