求一道五年级简便计算题：23.58*5.37-7.54*2.19+7.642*53.7-25.6*0.219=?
问题描述：
求一道五年级简便计算题：23.58*5.37-7.54*2.19+7.642*53.7-25.6*0.219=?
答
23.58*5.37-7.54*2.19+7.642*53.7-25.6*0.219
=23.58*5.37+76.42*5.37-7.54*2.19-2.56*2.19
=(23.58+76.42)*5.37-(7.54+2.56)*2.19
=100*5.37-10.1*2.19
=537-22.119
=514.881