第4,5.6.7.8题不会,怎么写??
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把分数转化为小数,或者把小数转化为分数
4.
0.13+3/8*0.96+2.87
=0.13+3*0.12+2.87
=0.13+0.36+2.87
=3.36
5.
19.55÷[(1.2+1/2)*5]
=19.55÷(1.7*5)
=19.55÷8.5
=2.3
6.
3/17+2/9÷4/7+29/18
=3/17+2/9*7/4+29/18
=3/17+7/18+29/18
=3/17+2
=37/17
7.
8/9*[75%÷(7/16-1/4)]8/9*[3/4÷(7/16-4/16)]
=8/9*(3/4÷3/16)
=8/9*1/4
=2/9
8.
11/15*9/10+11/15÷10
=11/50+11/15*1/10
=11/50+11/150
=33/150+11/150
=44/150
=22/75
4.
0.13+3/8*0.96+2.87
=0.13+3*0.12+2.87
=0.13+0.36+2.87
=3.36
5.
19.55÷[(1.2+1/2)*5]
=19.55÷(1.7*5)
=19.55÷8.5
=2.3
6.
3/17+2/9÷4/7+29/18
=3/17+2/9*7/4+29/18
=3/17+7/18+29/18
=3/17+2
=37/17
7.
8/9*[75%÷(7/16-1/4)]8/9*[3/4÷(7/16-4/16)]
=8/9*(3/4÷3/16)
=8/9*1/4
=2/9
8.
11/15*9/10+11/15÷10
=11/50+11/15*1/10
=11/50+11/150
=33/150+11/150
=44/150
=22/75
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