小学四道简便运算求答案(图)(要过程)
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4-9/17+8/17
=4-(9/17-8/17)
=4-1/17
=3又16/17
5/3+5/6-2/6-2/3
=(5/3-2/3)+(5/6-2/6)
=1+1/2
=1又1/2
(或3/2)
9/8-1/7+1/8-6/7
=(9/8+1/8)-(1/7+6/7)
=1又1/4-1
=1/4
2/7+(1/4-1/7)
=2/7-1/7+1/4
=1/7+1/4
=11/28
11/8-(1/10+3/8)-3/10
=(11/8-3/8)-(1/10+3/10)
=1-2/5
=1又2/5
(或7/5)
15/7-(8/9+1/7)
=15/7-1/7-8/9
=2-8/9
=1又1/9
(或10/9)
11/12-5/8+1/12-3/8
=(11/12+1/12)-(5/8+3/8)
=1-1
=0
=4-(9/17-8/17)
=4-1/17
=3又16/17
5/3+5/6-2/6-2/3
=(5/3-2/3)+(5/6-2/6)
=1+1/2
=1又1/2
(或3/2)
9/8-1/7+1/8-6/7
=(9/8+1/8)-(1/7+6/7)
=1又1/4-1
=1/4
2/7+(1/4-1/7)
=2/7-1/7+1/4
=1/7+1/4
=11/28
11/8-(1/10+3/8)-3/10
=(11/8-3/8)-(1/10+3/10)
=1-2/5
=1又2/5
(或7/5)
15/7-(8/9+1/7)
=15/7-1/7-8/9
=2-8/9
=1又1/9
(或10/9)
11/12-5/8+1/12-3/8
=(11/12+1/12)-(5/8+3/8)
=1-1
=0
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