用简便方法计算。
35×9×2 960÷8÷6÷5 125×24-25×24
125×(80-8) 265+358+42+135 950-178-422
320×25×125 125×11×8 99×25+25
(80+8)×125
答案:
35×9×2
=35×2×9
=70×9
=630;
960÷8÷6÷5
=960÷(6×5×8)
=960÷240
=4;
125×24-25×24
=24×(125-25)
=24×100
=2400;
125×(80-8)
=125×80-125×8
=10000-1000
=9000;
265+358+42+135
=(265+135)+(358+42)
=400+400
=800;
950-178-422
=950-(178+422)
=950-600
=350;
320×25×125
=(300+20)×25×125
=(300×25+20×25)×125
=(7500+500)×125
=8000×125
=1000000;
125×11×8
=125×8×11
=1000×11
=11000;
99×25+25
=99×25+1×25
=(99+1)25
=100×25
=2500;
(80+8)×125
=80×125+8×125
=10000+1000
=11000。
35x9x2简便运算方法
35×9×235×9×235×9×2=570