
选用合适的方法计算:7.5-(5.5+1.24) 0.26+15.68+9.7 6.98+3.72+7.28-4.98 13.26+9.55-3.26 3.
选用合适的方法计算:7.5-(5.5+1.24)0.26+15.68+9.76.98+3.72+7.28-4.9813.26+9.55-3.263.96-1.07+3.5...
选用合适的方法计算:7.5-(5.5+1.24) 0.26+15.68+9.7 6.98+3.72+7.28-4.98 13.26+9.55-3.26 3.96-1.07+3.54 1.27+3.9+0.73+16.1.
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(1)7.5-(5.5+1.24) =7.5-5.5-1.24 =2-1.24 =0.76; (2)0.26+15.68+9.7 =15.94+9.7 =25.64; (3)6.98+3.72+7.28-4.98 =(6.98-4.98)+(3.72+7.28) =2+11 =13; (4)13.26+9.55-3.26 =13.26-3.26+9.55 =10+9.55 =19.55; (5)3.96-1.07+3.54 =2.89+3.64 =6.53; (6)1.27+3.9+0.73+16.1 =(1.27+0.73)+(3.9+16.1) =2+20 =22. |
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