199.83*23+17*199.83=?(简便计算)
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![199.83*23+17*199.83=?(简便计算)](/uploads/image/z/11349919-55-9.jpg?t=199.83%2A23%2B17%2A199.83%3D%3F%EF%BC%88%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%EF%BC%89)
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199.83*23+17*199.83=?(简便计算)
199.83*23+17*199.83=?(简便计算)
199.83*23+17*199.83=?(简便计算)
原式=199.83*(23+17)
=199.83*40
=7993.2
199.83*23+17*199.83
=199.83*(23+17)
=(200-0.17)*40
=200*40-0.17*40
=8000-6.8
=7993.2
199.83*23+17*199.83
=199.83*(23+17)
=(200-0.17)*40
=200*40-0.17*40
=8000-6.8
=7993.2
199.83*23+17*199.83
=199.83*(23+17)
=(200-0.17)*40
=200*40-0.17*40
=8000-6.8
=7993.2
199.83*23+17*199.83=?(简便计算)
(-64)+17+(-23)+68=
(23分之4+17分之5)*23*17=?
17*23-23*7简便计算除了17×23-23×7=23×(17-7)=23×10=230
计算-16+23+(-17)-(-7)=
23+(-17)+6+(-22)=多少?
23+(-17)+6+(-22)=?
-17+23+(-16)-(-7)=?
1%=(17%X-23)/X
解方程组23x+17y=63,17x+23y=57
解方程组:{23x+17y=63,17x+23y=57
解方程组23x+17y=63,17x+23y=57
方程组23x+17y=63,17x+23y=57
25×17+25×23=25×(17+23)是运用了什么运算定律
这题简便计算,怎么写?17×23-23×7 = = = 记得先乘后减这题简便计算,怎么写?17×23-23×7== =记得先乘后减
A/17=B/23,那么A:B=
17×23-23×7
23 ×25+17× 25=(23+17)× 25=40×25=10 (4 ×25)是什么运算定律?