(1)简便运算 (1)9分之7+10分之3-9分之2+10分之17 (2)0.82+3又25分之4-(1.14+5分之4)(3)3又4分之1+(2.2+4又10分之7)-(2又4分之1-1又6分之5)(4)1又3分之2+12又8分之1-(6又6分之5+4.5)
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/26 01:43:05
![(1)简便运算 (1)9分之7+10分之3-9分之2+10分之17 (2)0.82+3又25分之4-(1.14+5分之4)(3)3又4分之1+(2.2+4又10分之7)-(2又4分之1-1又6分之5)(4)1又3分之2+12又8分之1-(6又6分之5+4.5)](/uploads/image/z/685835-35-5.jpg?t=%281%29%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97+%EF%BC%881%EF%BC%899%E5%88%86%E4%B9%8B7%2B10%E5%88%86%E4%B9%8B3-9%E5%88%86%E4%B9%8B2%2B10%E5%88%86%E4%B9%8B17+%EF%BC%882%EF%BC%890.82%2B3%E5%8F%8825%E5%88%86%E4%B9%8B4-%EF%BC%881.14%2B5%E5%88%86%E4%B9%8B4%EF%BC%89%EF%BC%883%EF%BC%893%E5%8F%884%E5%88%86%E4%B9%8B1%2B%EF%BC%882.2%2B4%E5%8F%8810%E5%88%86%E4%B9%8B7%EF%BC%89-%EF%BC%882%E5%8F%884%E5%88%86%E4%B9%8B1-1%E5%8F%886%E5%88%86%E4%B9%8B5%EF%BC%89%EF%BC%884%EF%BC%891%E5%8F%883%E5%88%86%E4%B9%8B2%2B12%E5%8F%888%E5%88%86%E4%B9%8B1-%EF%BC%886%E5%8F%886%E5%88%86%E4%B9%8B5%2B4.5%EF%BC%89)
(1)简便运算 (1)9分之7+10分之3-9分之2+10分之17 (2)0.82+3又25分之4-(1.14+5分之4)(3)3又4分之1+(2.2+4又10分之7)-(2又4分之1-1又6分之5)(4)1又3分之2+12又8分之1-(6又6分之5+4.5)
(1)简便运算 (1)9分之7+10分之3-9分之2+10分之17 (2)0.82+3又25分之4-(1.14+5分之4)
(3)3又4分之1+(2.2+4又10分之7)-(2又4分之1-1又6分之5)
(4)1又3分之2+12又8分之1-(6又6分之5+4.5)
(1)简便运算 (1)9分之7+10分之3-9分之2+10分之17 (2)0.82+3又25分之4-(1.14+5分之4)(3)3又4分之1+(2.2+4又10分之7)-(2又4分之1-1又6分之5)(4)1又3分之2+12又8分之1-(6又6分之5+4.5)
(1)7/9+3/10-2/9+17/10=5/9+2=2又5/9
(2)0.82+3 4/25-(1.14+4/5)=0.82+3.16-1.14-0.8=0.02+2.02=2.04
(3)3又4分之1+(2.2+4又10分之7)-(2又4分之1-1又6分之5)
=13/4+2.2+47/10-9/4+11/6
=3.25+2.2+4.7-2.25+11/6=7.9+11/6=8+9/10+5/6=9又11/15
(4)1又3分之2+12又8分之1-(6又6分之5+4.5)
=5/3+97/8-(41/6+4.5)
=10/6+12.125-41/6-4.5
=7.625-31/6=7又8分之5-5又6分之1
=2+30/48-8/48=2又48分之22=2又24分之11
??
(1)2+九分之五
(2)2.04
(1)9分之7+10分之3-9分之2+10分之17
=7/9+3/10-2/9+17/10
=7/9-2/9+3/10+17/10
=5/9+2
=2又5/9
(2)0.82+3又25分之4-(1.14+5分之4)
=0.82+3.16-(1.14+0.8)
=0.82+3.16-1.14-0.8
=0.82-0.8+3.16-1....
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(1)9分之7+10分之3-9分之2+10分之17
=7/9+3/10-2/9+17/10
=7/9-2/9+3/10+17/10
=5/9+2
=2又5/9
(2)0.82+3又25分之4-(1.14+5分之4)
=0.82+3.16-(1.14+0.8)
=0.82+3.16-1.14-0.8
=0.82-0.8+3.16-1.14
=0.02+2.02
=2.04
(3)3又4分之1+(2.2+4又10分之7)-(2又4分之1-1又6分之5)
=13/4+(22/10+47/10)-(9/4-11/6)
=13/4+69/10-9/4+11/6
=13/4-9/4+69/10+11/6
=1+69/10+11/6
=1+6+9/10+1+5/6
=8+9/10+5/6
=8+27/30+25/30
=8+52/30
=8+26/15
=8+1+11/15
=9又11/15
3又4分之1+(2.2+4又10分之7)-(2又4分之1-1又6分之5)
=3+1/4+(2+1/5+4+7/10)-(2+1/4-1-5/6)
=3+1/4+(6+1/5+7/10)-(1+1/4-5/6)
=3+1/4+6+1/5+7/10-1-1/4+5/6
=3+6-1+1/4-1/4+1/5+7/10+5/6
=8+1/5+7/10+5/6
=8+6/30+21/30+25/30
=8+52/30
=8+26/15
=8+1+11/25
=9又11/15
=13/4+69/10-9/4+11/6
=13/4-9/4+69/10+11/6
=1+69/10+11/6
=1+6+9/10+1+5/6
=8+9/10+5/6
=8+27/30+25/30
=8+52/30
=8+26/15
=8+1+11/15
=9又11/15
(4)1又3分之2+12又8分之1-(6又6分之5+4.5)
=1+2/3+12+1/8-(6+5/6+4+1/2)
=13+2/3+1/8-(10+5/6+1/2)
=13+2/3+1/8-10-5/6-1/2
=3+2/3-5/6+1/8-1/2
=3+4/6-5/6+1/8-4/8
=3-1/6-3/8
=3-4/24-9/24
=3-13/24
=2+1-13/24
=2+11/24
=2又11/24
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