(要简便运算)(1)96.625—99.32+3.375—68% (2)(8分之15+4分之1—2分之1)÷8分之1×29分之4
(3)101×100分之99(4)(7.8+7.8+7.8+7.8)×25%(5)6分之7—(40%+5分之3)×6分之5(6)98×101—98(7)59×99(8)1...
(3)101×100分之99 (4)(7.8+7.8+7.8+7.8)×25% (5)6分之7—(40%+5分之3)×6分之5 (6)98×101—98 (7)59×99 (8)18分之1×4分之7+4分之3×18分之7 (9)(8分之7+16分之13)÷16分之13 (10)1.25×32×0.25 (11)(12分之7—8分之3)×24—9分之5
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1)96.625—99.32+3.375—68%
=96.625—99.32+3.375—0.68
=96.625+3.375-(99.32+0.68)
=100-100
=0
2)(8分之15+4分之1—2分之1)÷8分之1×29分之4
=(8分之15+4分之1—2分之1)×8×29分之4
=﹙15+2-4﹚×29分之4
=13×29分之4
=29分之42
3)101×100分之99
=101×(1-1/100)
=101-101/100
=99又99/100
(4)(7.8+7.8+7.8+7.8)×25%
=7.8×4×0.25
=7.8
(5)6分之7—(40%+5分之3)×6分之5
=7/6--(0.4+0.6)×5/6
=7/6--5/6
=1/3
(6)98×101—98
=98×101-98×1
=98×(101--1)
=98×100
=9800
(7)59×99
=59×﹙100--1﹚
=5900-59
=5841
(8)18分之1×4分之7+4分之3×18分之7
=1/18×7/4+21/4×1/18
=1/18×﹙7/4+21/4)
=1/18×7
=7/18
(9)(8分之7+16分之13)÷16分之13
=﹙7/8+13/16﹚×16/13
=14/13+1
=27/13
(10)1.25×32×0.25
=5/4×32×1/4
=5/16×32
=10
(11)(12分之7—8分之3)×24—9分之5
=7×2--3×3--5/9
=14--9--5/9
=5--5/9
=40/9
=96.625—99.32+3.375—0.68
=96.625+3.375-(99.32+0.68)
=100-100
=0
2)(8分之15+4分之1—2分之1)÷8分之1×29分之4
=(8分之15+4分之1—2分之1)×8×29分之4
=﹙15+2-4﹚×29分之4
=13×29分之4
=29分之42
3)101×100分之99
=101×(1-1/100)
=101-101/100
=99又99/100
(4)(7.8+7.8+7.8+7.8)×25%
=7.8×4×0.25
=7.8
(5)6分之7—(40%+5分之3)×6分之5
=7/6--(0.4+0.6)×5/6
=7/6--5/6
=1/3
(6)98×101—98
=98×101-98×1
=98×(101--1)
=98×100
=9800
(7)59×99
=59×﹙100--1﹚
=5900-59
=5841
(8)18分之1×4分之7+4分之3×18分之7
=1/18×7/4+21/4×1/18
=1/18×﹙7/4+21/4)
=1/18×7
=7/18
(9)(8分之7+16分之13)÷16分之13
=﹙7/8+13/16﹚×16/13
=14/13+1
=27/13
(10)1.25×32×0.25
=5/4×32×1/4
=5/16×32
=10
(11)(12分之7—8分之3)×24—9分之5
=7×2--3×3--5/9
=14--9--5/9
=5--5/9
=40/9
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)(1)96.625—99.32+3.375—68%
=(96.625+3.375)-(99.32+0.68)
=100-100
=0
(2)( 15/8+1/4-1/2)/(1/8)*4/29
=(15/8*8+1/4*8-1/2*8)*4/29
=(15+2-4)*4/29
=13*4/29
=52/29
(3)101*(99/100)
=(100+1)*99/100
=99+99/100
=99.99
(4)(7.8+7.8+7.8+7.8)×25%
=7.8*(4*1/4)
=7.8
(5)7/6—(40%+3/5)×5/6
=7/6-(2/5+3/5)*5/6
=7/6-5/6
=1/3
(6)98*101-98
=98*(101-1)
=98*100
=9800
(7)59×99
=59*(100-1)
=5900-59
=5841
(8)1/18×7/4+3/4×7/18
=7/18*1/4+3/4*7/18
=(1/4+3/4)*7/18
=7/18
(9)(7/8+13/16)÷16分之13
=(7/8)/16分之13 +(13/16)/16分之13
=14/13+1
=27/13
(10)1.25×32×0.25
=1.25*8*4*0.25
=(1.25*8)*(4*0.25)
=10*1
=10
(11)(7/12—3/8)×24—5/9
=7/12*24-3/8*24-5/9
=14-9-5/9
=4又4/9
=(96.625+3.375)-(99.32+0.68)
=100-100
=0
(2)( 15/8+1/4-1/2)/(1/8)*4/29
=(15/8*8+1/4*8-1/2*8)*4/29
=(15+2-4)*4/29
=13*4/29
=52/29
(3)101*(99/100)
=(100+1)*99/100
=99+99/100
=99.99
(4)(7.8+7.8+7.8+7.8)×25%
=7.8*(4*1/4)
=7.8
(5)7/6—(40%+3/5)×5/6
=7/6-(2/5+3/5)*5/6
=7/6-5/6
=1/3
(6)98*101-98
=98*(101-1)
=98*100
=9800
(7)59×99
=59*(100-1)
=5900-59
=5841
(8)1/18×7/4+3/4×7/18
=7/18*1/4+3/4*7/18
=(1/4+3/4)*7/18
=7/18
(9)(7/8+13/16)÷16分之13
=(7/8)/16分之13 +(13/16)/16分之13
=14/13+1
=27/13
(10)1.25×32×0.25
=1.25*8*4*0.25
=(1.25*8)*(4*0.25)
=10*1
=10
(11)(7/12—3/8)×24—5/9
=7/12*24-3/8*24-5/9
=14-9-5/9
=4又4/9
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101×(1-1/100)=101-101/100=99又99/100
也可以是(100+1)×99/100=99+99/100
7.8×4×2.5=7.8×10=78
也可以是(100+1)×99/100=99+99/100
7.8×4×2.5=7.8×10=78
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