递等式计算(简便计算)
(720+270)÷55-120÷24(63+480÷16)-2913.67-2.97+25.87.06-2.78+13.78...
(720+270)÷55-120÷24(63+480÷16)-2913.67-2.97+25.87.06-2.78+13.78
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2013-07-25
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(720+270)÷55-120÷24
=990÷55-120÷(12×2)
=990÷110×2-120÷12÷2
=9×2-10÷2
=18-5
=13
===================
(63+480÷16)-29
=(63+30×16÷16)-29
=63+30-30+1
=64
====================
13.67-2.97+25.8
=13.67-3+0.03+25.8
=10.67+0.03+25.8
=10.7+25.8
=36.5
===========================
7.06-2.78+13.78
=7.06+13.78-2.78
=7.06-(13.78-2.78)
=7.06+11
=18.06
=990÷55-120÷(12×2)
=990÷110×2-120÷12÷2
=9×2-10÷2
=18-5
=13
===================
(63+480÷16)-29
=(63+30×16÷16)-29
=63+30-30+1
=64
====================
13.67-2.97+25.8
=13.67-3+0.03+25.8
=10.67+0.03+25.8
=10.7+25.8
=36.5
===========================
7.06-2.78+13.78
=7.06+13.78-2.78
=7.06-(13.78-2.78)
=7.06+11
=18.06
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2013-07-25
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(720+270)÷55-120÷24
=990÷11÷5-5
=90÷5-5
=18-5
=13
(63+480÷16)-29
=(63+30)-30+1
=61
13.67-2.97+25.8
=13.67-3+26+0.03-0.2
=36.67-0.2+0.03
=36.47+0.03
=36.5
7.06-2.78+13.78
=7.06+(13.78-2.78)
=7.06+11
=18.06
=990÷11÷5-5
=90÷5-5
=18-5
=13
(63+480÷16)-29
=(63+30)-30+1
=61
13.67-2.97+25.8
=13.67-3+26+0.03-0.2
=36.67-0.2+0.03
=36.47+0.03
=36.5
7.06-2.78+13.78
=7.06+(13.78-2.78)
=7.06+11
=18.06
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2013-07-25
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1. =990÷55-5=90÷5-5=18-5=13
2. =63+30-29=64
3. =10.7+25.8=36.5
4. =7.06+(13.78-2.78)=7.06+11=18.06
2. =63+30-29=64
3. =10.7+25.8=36.5
4. =7.06+(13.78-2.78)=7.06+11=18.06
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2013-07-25
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7.06-2.78+13.78
=7.06+(13.78-2.78)
=7.06+11
=18.26
=7.06+(13.78-2.78)
=7.06+11
=18.26
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