6.6+0.6×20+0.×19 简便运算
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6.6+0.6×20+0.×19 简便运算
6.6+0.6×20+0.6×19
=0.6×11+0.6×20+0.6×19
=0.6×(11+20+19)
=0.6×50
=30
6.6+0.6×20+0.6×19
=0.6×11+0.6×20+0.6×19
=0.6×(11+20+19)
=0.6×50
=30
赞同一楼和二楼的
6.6+0.6×20+0.6×19
=6.6+12+0.6x19
=0.6x(11+19)+12
=30