脱式计算，能简算的要简算5.7×1 +2.5÷4 7.23+14.75-6.87+2.77-8
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=5.7+14.75+2.77-8-6.87+2.5/47.23
=5.7+2.77+14.75-14.87+0.05
=5.7+2.65+0.05
=8.4
=5.7+2.77+14.75-14.87+0.05
=5.7+2.65+0.05
=8.4
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展开全部
5.7×1 +2.5÷4
= 5.7 + 0.625
= 6.325
7.23+14.75-6.87+2.77-8
= 7.23+2.77 +(14.75 -6.87)-8
= 10 + 7.9 - 8
= 10 - 0.1
= 9.9
= 5.7 + 0.625
= 6.325
7.23+14.75-6.87+2.77-8
= 7.23+2.77 +(14.75 -6.87)-8
= 10 + 7.9 - 8
= 10 - 0.1
= 9.9
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5.7×1 +2.5÷4
=5.7+0.625
=6.325
7.23+14.75-6.87+2.77-8
=(7.23+2.77)-0.12
=10-0.12
=9.88
=5.7+0.625
=6.325
7.23+14.75-6.87+2.77-8
=(7.23+2.77)-0.12
=10-0.12
=9.88
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展开全部
5.7×1 +2.5÷4
6-0.3+0.625
6+(0.625-0.3)
=6.325
7.23+14.75-6.87+2.77-8
=7.23+2.77+15-0.25-7+0.13-8
=10-0.25+0.13
=10-0.12
=9.88
6-0.3+0.625
6+(0.625-0.3)
=6.325
7.23+14.75-6.87+2.77-8
=7.23+2.77+15-0.25-7+0.13-8
=10-0.25+0.13
=10-0.12
=9.88
追问
看不太懂，需要详细解答
追答
晕。这不是很详细了么？一步一步都列出来了
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