213X0.53+338X0.47+125X0.33的简便运算

如题所述

213X0.53+338X0.47+125X0.33
=213x0.53+213x0,47+125x0.47+125x0.33
=(0,53+0,47)x213+(0,47+0,33)x125
=1x213+0,8x125
=213+100
=313
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第1个回答  2012-01-22
213X0.53+338X0.47+125X0.33
=213X0.53+(213+125)X0.47+125X0.33
=213X0.53+213X0.47+125X0.47+125X0.33
=213X(0.53+0.47)+125X(0.47+0.33)
=213+125X0.8
=213+100
=313