5.34+6.78+2.15用简便计算怎么算？
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5.34+6.78+2.15=5.22+0.12+6.78+2.15=（5.22+6.78）+（0.12+2.15）=12+2.27=14.27
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计算过程：
=5.34+6.78+0.66+0.22-0.66-0.22+2.15
=(5.34+0.66)+(6.78+0.22)+(2.15-0.22-0.66)
=6+7+2.15-0.88
=6+7+1.27
=13+1.27
=14.27
=5.34+6.78+0.66+0.22-0.66-0.22+2.15
=(5.34+0.66)+(6.78+0.22)+(2.15-0.22-0.66)
=6+7+2.15-0.88
=6+7+1.27
=13+1.27
=14.27
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原式=5.34+6.78+0.66+0.22-0.66-0.22+2.15
=(5.34+0.66)+(6.78+0.22)+(2.15-0.22-0.66)
=6+7+2.15-0.88=6+7+1.27
=13+1.27
=14.27
=(5.34+0.66)+(6.78+0.22)+(2.15-0.22-0.66)
=6+7+2.15-0.88=6+7+1.27
=13+1.27
=14.27
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原式=5.34+6.78+0.66+0.22-0.66-0.22+2.15
=(5.34+0.66)+(6.78+0.22)+(2.15-0.22-0.66)
=6+7+2.15-0.88
=6+7+1.27
=13+1.27
=14.27
=(5.34+0.66)+(6.78+0.22)+(2.15-0.22-0.66)
=6+7+2.15-0.88
=6+7+1.27
=13+1.27
=14.27
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先将5.34折成5.22+0.12就能使其中2个加数相加得到一个整数。具体如下:
5.34+6.78+2.15
=5.22+0.12+6.78+2.15
=(5.22+6.78)+(0.12+2.15)
=12+2.27
=14.27
5.34+6.78+2.15
=5.22+0.12+6.78+2.15
=(5.22+6.78)+(0.12+2.15)
=12+2.27
=14.27
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