
简便计算.6.73-(3.73
简便计算.6.73-(3.73-2.24)1.27+2.9+0.73+16.112.75-(1.1+2.75)3.35-4.68+2.65....
简便计算.6.73-(3.73-2.24)1.27+2.9+0.73+16.112.75-(1.1+2.75)3.35-4.68+2.65.
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(1)6.73-(3.73-2.24) =6.73-3.73-2.24 =3-2.24 =0.76; (2)1.27+2.9+0.73+16.1 =(1.27+0.73)+(2.9+16.1) =2+19 =21; (3)12.75-(1.1+2.75) =12.75-2.75-1.1 =10-1.1 =8.9; (4)3.35-4.68+2.65 =3.35+2.65-4.68 =6-4.68 =1.32. |
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