Addition and subtraction of 20 decimal places in the fourth grade

0.45+2.85= 2.73-0.23= 3.67+2.46= 7.5-3. 18

0.5 1-0.37 4.0 1-0.82 2.6 1-0.77= 1.59+3.95=

6.54+0.58= 54.49-22.5= 23.25+2 1.35= 9.36+43.56=

16.65+ 18.87= 0.99+24.85= 9.45-6.6 1= 85.69-48.58=

45.46-26.57= 64. 19-29.57= 33.84+ 16.5= 3.85+6 1. 18=

35.65- 19.9= 6.49-4.8 1= 35.4 1-24.58= 52.65+9.25=

2 1.65+4.05= 26.65- 15.24= 56.56- 12.87= 9.08- 1.28=

64.25-52.73= 3 1.5 1+8.4= 8.43+8.8 1= 26.34- 15.24=

17.38+ 15.25= 16.68-9.54= 54.63-42. 14= 13.24+8.64=

16.25-7.94= 63.43- 18. 18= 16.36+56. 16= 4 1.98+ 18.24=

45.52-22. 18= 69.52-3 1.48=

More than 20 lanes.