6.4+5.85+3.6 8.28-(1.28+3.7)
0.48×5.3+0.48×4.7 5.7×1.8+1.2
①8.47+12.53-1.2 ②50-19.8-20.2 ③19.4+4.58+5.42
45-6.58-7.42
6.92×14.3+14.3×3.08
1.25×7.9×0.8
100-24.58-35.42
76×98+152
2990÷13-2990÷23
25×16×125
158×[（27+54）÷9]
4.13-3.66+5.87-2.34
7.91-0.85+2.09
23-0.34-1.66
54×0.25+7.5×5.4
7.69+9.97+2.31
52.7-18.46-1.54
0.25×8.7×4
0.97×5.2-0.87×5.2
(1.25+12.5)×8
84×0.78+0.78×16
6.8+7.56+3.2 100-5.75- 4.25
9.53×63+37×9.53 12.5×2.5×32
5.4+0.74+4.6=5.4++0.74
4.04+13.57+2.43=4.04+(◯）
48.72-0.2-0.8=48.72-(◯）
2.3+5.4+8.7+3.6=（ ◯ ）◯（ ◯ ）