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=( ◯ )◯( ◯ )
①8.47+12.53-1.2 ②50-19.8-20.2 ③19.4+4.58+5.42
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
16.3-7.6-2.4 8.8+4.3+5.2
9-(3.02+1.25) 2.13-1.59+0.87