小学五年级数学简便计算(如下)
1.15.5-11.62+14.5-13.382.4.25-(3.6-0.82)3.8.32-2.65+3.924.27.3+6.26+2.7+1.745.4.6*2.5...
1.15.5-11.62+14.5-13.38
2.4.25-(3.6-0.82)
3.8.32-2.65+3.92
4.27.3+6.26+2.7+1.74
5.4.6*2.5+10.7
6.(9.4+2.85)/(3.75-1.25)
没有简便的可以不简便
递等式计算 展开
2.4.25-(3.6-0.82)
3.8.32-2.65+3.92
4.27.3+6.26+2.7+1.74
5.4.6*2.5+10.7
6.(9.4+2.85)/(3.75-1.25)
没有简便的可以不简便
递等式计算 展开
3个回答
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1.15.5-11.62+14.5-13.38=
=(15.5+14.5)-(11.62+13.38)
=30-25
=5
2.4.25-(3.6-0.82)
=4.25-3.6+0.82
=4.25-3+0.82-0.6
=1.25+0.22
=1.47
3.8.32-2.65+3.92
=8.32-3+0.35+3.92
=8.32+0.35+3.95-3
=8.67+0.95
=8.67+1-0.05
=9.67-0.05
=9.62
4.27.3+6.26+2.7+1.74
=(27.3+2.7)+(6.26+1.74)
=30+8=38
5.4.6*2.5+10.7
=2.3*2*2.5+10.7
=2.3*5+10.7
=11.5+10.7
=22.2
6.(9.4+2.85)/(3.75-1.25)
=(9.4+0.6+2.25)/(2.5)
=12.25/2.5
=24.5/5
=4.9
=(15.5+14.5)-(11.62+13.38)
=30-25
=5
2.4.25-(3.6-0.82)
=4.25-3.6+0.82
=4.25-3+0.82-0.6
=1.25+0.22
=1.47
3.8.32-2.65+3.92
=8.32-3+0.35+3.92
=8.32+0.35+3.95-3
=8.67+0.95
=8.67+1-0.05
=9.67-0.05
=9.62
4.27.3+6.26+2.7+1.74
=(27.3+2.7)+(6.26+1.74)
=30+8=38
5.4.6*2.5+10.7
=2.3*2*2.5+10.7
=2.3*5+10.7
=11.5+10.7
=22.2
6.(9.4+2.85)/(3.75-1.25)
=(9.4+0.6+2.25)/(2.5)
=12.25/2.5
=24.5/5
=4.9
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这些都可以用计算机算出来。
1) 5
2) 1.47
3) 9.59
4) 38
5) (4.6*2.5)+10.7= 11.5+10.7
= 22.2
6) (9.4+2.85)/(3.75-1.25)=12.25/2.5=4.9
1) 5
2) 1.47
3) 9.59
4) 38
5) (4.6*2.5)+10.7= 11.5+10.7
= 22.2
6) (9.4+2.85)/(3.75-1.25)=12.25/2.5=4.9
追问
…要用递等式…简便
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