4/5+8*0.45简便计算

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4/5+8*0.45简便计算4/5+8*0.45简便计算4/5+8*0.45简便计算4/5+8*0.45=0.8+0.8x4.5=(1+4.5)x0.8=5.5x0.8=4.44/5+8*0.45=0

4/5+8*0.45简便计算
4/5+8*0.45简便计算

4/5+8*0.45简便计算
4/5+8*0.45
=0.8+0.8x4.5
=(1+4.5)x0.8
=5.5x0.8
=4.4

4/5+8*0.45
=0.8+0.8*4.5
=0.8*(1+4.5)
=0.8*5.5
=4/5 *5.5
=4*1.1
=4.4

4/5+8*0.45
=4/5+8*9/20
=16/20+72/20
=(16+72)/20
=88/20
=4.4