
直接写得数. 0.3+0.7= 1-0.26= 2+0.48= 0.78+0.02= 0.8-0.08= 12.8-9.8= 10.5-6.5= 9.
直接写得数.0.3+0.7=1-0.26=2+0.48=0.78+0.02=0.8-0.08=12.8-9.8=10.5-6.5=9.8+2=1.7+2.6=3.9+1....
直接写得数. 0.3+0.7= 1-0.26= 2+0.48= 0.78+0.02= 0.8-0.08= 12.8-9.8= 10.5-6.5= 9.8+2= 1.7+2.6= 3.9+1.7=
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0.3+0.7=1; | 1-0.26=0.74; | 2+0.48=2.48; | 0.78+0.02=0.8; | 0.8-0.08=0.72; |
12.8-9.8=3; | 10.5-6.5=4; | 9.8+2=11.8; | 1.7+2.6=4.3; | 3.9+1.7=5.6. |
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