原式=4.3+(0.6+6.4)
=4.3+7
=5
35×括号1-4/7加五分之3=脱式计算
35×括号1-4/7加五分之3
=35*1-35*4/7+35*3/5
=35-20+21
=36
4/5-(3/8+1/4)
=4/5-5/8
=32/40-25/40
=7/40
3/5-(2/15+1/3)
=9/15-2/15-5/15
=(9-2-5)/15
=2/15
3/8 - ( 4/5 - 5/8 ) = 3/8 - 4/5 + 5/8 = 3/8 + 5/8 - 4/5 = 1- 4/5= 1/4
把括号打开,3/8 + 5/8凑成 1 ,再减 4/5
8/15÷(4/5+1/10)
=8/15÷(8/10+1/10)
=8/15÷9/10
=8/15×10/9
=16/27
12
答:五分之4-括号十六分之13-6分之五括回+4分之三
=4/5-13/16+5/6+3/4
=49/30-1/16
=392/240-15/240
=377/240
五分之3×括号三分之2-x反括号=5分之一怎么解
3/5*(2/3-x)=1/5
2/3-x=1/3
x=2/3-1/3
x=1/3
4/5(4x/5+40)=28/25
4x/5+40=7/5
4x+200=7
x=-193/4