11*11*11-11*11-10= 36*1111+8888*8=

11*11*11-11*11-10= 36*1111+8888*8=

11*11*11-11*11-10=(11*11)*(11-1)-10=11*11*10-10=10*(11*11-1)=10*(11+1)*(11-1)=1200...36*1111+8888*8=36*1111+8*1111*8=1111*(36+8*8)=1111*100=111100

Simple math problem, must be simple, 500000 points
5/6+1/2*5/12
15*1/6-4/15

5/6+1/2×5/12
＝2×5/12＋1/2×5/12
=(2+1/2)×5/12
＝5/2×5/12
＝25/24
= 1 and 1 / 24
15×1/6-4/15
= 2 and 1 / 2-4 / 15
＝2＋（1/2－4/15）
＝2＋7/30
= 2 and 7 / 30

To solve these problems, it is necessary to simplify the process
① 1 / 7 x 1 / 4 x 7x4 ② (4 / 7 + 5 / 8) x 56 ③ 1 / 6 - 2 / 3 x 1 / 8 ④ 13 / 15 + 13 / 15 x 14 ⑤ 7 / 9 x (18 + 3 / 7) ⑥ 4 / 9 x 1 / 4 x 9 / 11

1 1/7*1/4*7*4=(1/7*7)*(1/4*4)=12 (4/7+5/8 )*56=4/7*56+5/8*56=32+35=673 1/6-2/3*1/8=1/6-1/12=1/124 13/15+13/15*14=13/15*(1+14)=13/15*15=135 7/9*(18+3/7)=7/9*18+7/9*3/7=14+1/3=141/36 4/9*1/4*9/11=1/11

Fifth grade volume two mathematics score addition and subtraction simple calculation. To 20 questions! More points, less points
Must score addition and subtraction, can't have multiplication and division. Otherwise no points!
It's a fraction, like 2 / 5 + 1 / 3 + 3 / 5
=（2/5+3/5）+1/3
=1+1/3
=1 and 1 / 3
I see

1/2+1/3= 2/5+3/4= 8/9+2/3= 3/8+1/2= 7/15=8/15=
1/2-1/3= 3/4-2/5= 8/9-2/3= 1/2-3/8= .