递等式,怎样简便怎么算 0.98*302=? 25*4.4*0.7=? 5.8*5.8+5.8*0.5+5.8=? (0
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递等式,怎样简便怎么算 0.98*302=? 25*4.4*0.7=? 5.8*5.8+5.8*0.5+5.8=? (0.25*12.5)*(4*0.8)=?
105*105=? 32*1.25=?2.3+1.7*5.5=?急!
105*105=? 32*1.25=?2.3+1.7*5.5=?急!
![递等式,怎样简便怎么算 0.98*302=? 25*4.4*0.7=? 5.8*5.8+5.8*0.5+5.8=? (0](/uploads/image/z/4924989-45-9.jpg?t=%E9%80%92%E7%AD%89%E5%BC%8F%2C%E6%80%8E%E6%A0%B7%E7%AE%80%E4%BE%BF%E6%80%8E%E4%B9%88%E7%AE%97+0.98%2A302%3D%3F+25%2A4.4%2A0.7%3D%3F+5.8%2A5.8%2B5.8%2A0.5%2B5.8%3D%3F+%280)
0.98*302
=0.98*(300+2)
=0.98*300+0.98*2
=294+1.76
=295.76
25*4.4*0.7
=(25*4)*(1.1*0.7)
=100*0.77
=77
5.8*5.8+5.8*0.5+5.8
=(5.8+0.5+1)*5.8
=7.3*5.8
=42.34
(0.25*12.5)*(4*0.8)
=(0.25*4)*(12.5*0.8)
=1*10
=10
=0.98*(300+2)
=0.98*300+0.98*2
=294+1.76
=295.76
25*4.4*0.7
=(25*4)*(1.1*0.7)
=100*0.77
=77
5.8*5.8+5.8*0.5+5.8
=(5.8+0.5+1)*5.8
=7.3*5.8
=42.34
(0.25*12.5)*(4*0.8)
=(0.25*4)*(12.5*0.8)
=1*10
=10
递等式,怎样简便怎么算 0.98*302=? 25*4.4*0.7=? 5.8*5.8+5.8*0.5+5.8=? (0
递等式,怎样简便怎么算 0.98*302=?25*4.4*0.7=?5.8*5.8+5.8*0.5+5.8=?(0.25
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