7/8 4/7 1/8,怎样算最简便?(递等式)
7/8 4/7 1/8,怎样算最简便?(递等式)
7/8+4/7+1/8
=7/8+1/8+4/7
=1+4/7
=1又4/7
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4/9*5/11+5/9*7/11怎样计算最简便?
可以利用:4/9*5/11=5/9*4/11这一特点。 4/9*5/11+5/9*7/11 =5/9*4/11+5/9*7/11 =5/9*(4/11+7/11) =5/9*1 =5/9
7/11×7/8-5/12×7/11 1/15×13/17-8/17×1/15 递等式计算 、、、、 3Q。
7/11×7/8-5/12×7/11
=7/11×(21/24-10/24)
=7/11×11/24
=7/24
1/15×13/17-8/17×1/15
=1/15×(13/17-8/17)
=1/15×5/17
=1/51
(125-4)×8怎样用递等式计算最简便???????????????
(125-4)×8
=125×8-4×8
=1000-32
=968
7/8*5/14-7/15*4/8怎样简便计算
7/8*5/14-7/15*4/8=7/8*(5/14-4/15)=7/8*[(15*5-14*4)/(14*15)]=7/8*[19/(14*15)]=19/(2*15*8)=19/240
1÷(75%+4/1)-7/1递等式解答
1÷(75%+4/1)-7/1
=1÷1-7/1
=1-7/1
=7/6
9/6チ7ᅧ8(9/4 7/1) 7/6=? (递等式)
9/6チ7ᅧ8(9/4 7/1) 7/6=? (递等式)
6/9+(4/9+1/7)+6/7
=6/9+4/9+(1/7+6/7)
=10/9+1
=19/9
递等式计算:(1)7/8÷3/4+7/8x2/3,(2)0.45×1/6÷0.45x1/6,(3)
(1)7/8÷3/4+7/8x2/3
=7/8x4/3+7/8x2/3
=7/8x(4/3+2/3)
=7/8x2
=7/4
(2)0.45×1/6÷0.45x1/6
=(0.45÷0.45)x(1/6x1/6)
=1x1/36
=1/36
(3)4.8÷5/13-4又4/5x1.6
=4.8x13/5-4.8x8/5
=4.8x(13/5-8/5)
=4.8x1
=4.8
7/8*5/9+1/8*4/9怎样求,有简便吗
7/8*5/9+1/8*4/9
=1/8*35/9+1/8*4/9
=1/8*(35/9+4/9)
=1/8*13/3
=13/24
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