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(1)2.5*32*0.125 =(2.5*4)*(8*0.125) =10*1 =10
(2)3.5-7+6.5 =3.5+6.5-7 =3
(3)1.2×2.5+0.8×2.5 =2.5(1.2+0.8) =25
(4)8.9×1.25-0.9×1.25 =1.25(8.9-0.9) =10
(5)12.5×7.4×0.8 =12.5×0.8×7.4 =74
(6)6.5×9.5+6.5×0.5 =6.5×(9.5+0.5) =6.5×10 =65
(2)3.5-7+6.5 =3.5+6.5-7 =3
(3)1.2×2.5+0.8×2.5 =2.5(1.2+0.8) =25
(4)8.9×1.25-0.9×1.25 =1.25(8.9-0.9) =10
(5)12.5×7.4×0.8 =12.5×0.8×7.4 =74
(6)6.5×9.5+6.5×0.5 =6.5×(9.5+0.5) =6.5×10 =65
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