题目内容
36× | ×+ | ×+ |
(+) | × | 13-(4+3) |
解:(1)36×,
=(35+1)×,
=35×+1×,
=17+,
=17;
(2)×+,
=×+×,
=×+×,
=×(+),
=×1,
=;
(3)×+,
=×+×+,
=2++,
=2+(+),
=2+2,
=4;
(4)(+),
=(+)×,
=×+×,
=+1,
=4;
(5)×,
=×+×,
=(+)×,
=1×,
=;
(6)13-(4+3),
=13-4-3,
=13-3-4,
=10-4,
=5.
分析:(1)根据乘法分配律进行计算;
(2)根据乘法分配律进行计算;
(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)根据乘法分配律进行计算;
(6)根据连减的性质进行计算.
点评:四则运算,先弄清运算顺序,然后再进一步计算即可,能简算的要简算.
=(35+1)×,
=35×+1×,
=17+,
=17;
(2)×+,
=×+×,
=×+×,
=×(+),
=×1,
=;
(3)×+,
=×+×+,
=2++,
=2+(+),
=2+2,
=4;
(4)(+),
=(+)×,
=×+×,
=+1,
=4;
(5)×,
=×+×,
=(+)×,
=1×,
=;
(6)13-(4+3),
=13-4-3,
=13-3-4,
=10-4,
=5.
分析:(1)根据乘法分配律进行计算;
(2)根据乘法分配律进行计算;
(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)根据乘法分配律进行计算;
(6)根据连减的性质进行计算.
点评:四则运算,先弄清运算顺序,然后再进一步计算即可,能简算的要简算.
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