Question

简便计算，求过程，跪求了

Answer 1

=(200+5)x18-(6500+13)÷13
=200x18+5x18-6500÷13-13÷13
=3600+90-500-1
=3189

=2.89x(1+3)x25
=2.89x4x25
=2.89x(4x25)
=2.89x100
=289

=7/20x101-7/20
=7/20x(101-1)
=7/20x100
=35

=999+99+9+8/9x3+1/3
=999+99+9+8/3+1/3
=999+99+9+(8/3+1/3)
=999+99+9+3
=(999+1)+(99+1)+(9+1)
=1000+100+10
=1110

=5/8x8+2/27x8+11/27
=5+16/27+11/27
=5+(16/27+11/27)
=5+1
=6

=2/3x[(3/7-3/10)x10]
=2/3x[3/7x10-3/10x10]
=2/3x30/7-2/3x3
=20/7-2
=6/7

Answer 2

Answer 3

二，（2.89×4）×25
＝2.89×4×25
＝2.89×100
＝289

追答

7/20×101－（7/20×1）
＝7/20×（101－1）
＝7/20×100
＝35

2/3（3/7×10－3/10×10）
2/3（30/7－3）
2/3×30/7－2/3×3
20/7－2
20/7-14/7
6/7