脱式计算 (1)(0.69+0.35)×0.12 (2)〔32-(1.95-1.95)〕÷1.6 (3)15.52-1.6×5-5.7 (4)4.8×12-4.8×2 (5)0.6×2.5×0.5×4 (6)3.5×2.34+3.5×7.6.
(1)(0.69+0.35)×0.12, =1.04×0.12, =0.1248; (2)[32-(1.95-1.95)]÷1.6, =[32-0]÷1.6, =32÷1.6, =20; (3)15.52-1.6×5-5.7, =15.52-8-5.7, =7.52-5.7, =1.82; (4)4.8×12-4.8×2, =4.8×(12-2), =4.8×10, =48; (5)0.6×2.5×0.5×4, =(0.6×0.5)×(2.5×4), =0.3×10, =3; (6)3.5×2.34+3.5×7.6, =3.5×(2.34+7.6), =3.5×9.94, =3.5×(10-0.06), =3.5×10-3.5×0.06, =35-0.21, =34.79. |