Walt round and compensate decimals.
this was really easy because i'm in the top maths group
-0.4 +0.4 +0.6 -0.6
this was really easy because i'm in the top maths group
-0.4 +0.4 +0.6 -0.6
1a. 3.4 + 1.6 3.4 + 1.6
3+2=5 4+1=5
-0.2 +0.2 -0.1 +0.1
B. 4.2 + 0.9 4.2 + 0.9
4+1.1=5.1 4.1 +1=5.1
-0.2 +0.2 -0.5 +0.5
C. 7.2 + 4.5 7.2 + 4.5
7+4.7=11.7 5.7 +5=10.7
-0.2 +0.2 -0.0 +0.0
D. 12 + 0.8 12 + 0.8
11.8+1=12.8 12 +0.8=12.8
-0.2 =0.2 -0.3 +0.3
E. 13.2 + 5.7 13.2 + 5.7
13+5.9=18.9 12.9 +6=18.9
-0.3 +0.3 -0.2 +0.2
F. 10.3 + 0.8 10.3 + 0.8
10+1.1=11.1 10.1+1=11.1
-0.2 +0.2 +0.4 -0.4
G. 15.6 + 11.8 15.6 + 11.8
15.4+12=27.4 16+11.4=27.4
-0.1 +0.1 -0.3 +0.3
H. 12.3 + 9.9 12.3 + 9.9
12.2+10=22.2 12+9.6=21.6
-0.4 +0.4 -0.5 +0.5
I. 20.4 + 19.5 20.4 + 19.5
20+19.9=39.9 19.9+20=30.9
-0.1 +0.1 -0.4 +0.4
J. 18.1 + 8.6 18.1 + 8.6
18+8.7=267 17.7+9=26.7