算一算. 21.36÷0.8-12.9 7.28+3.2÷2.5 5.6×13-3×5.6 10.8×0.8÷0.27 [48-(2.48-1.28)]
算一算.21.36÷0.8-12.97.28+3.2÷2.55.6×13-3×5.610.8×0.8÷0.27[48-(2.48-1.28)]÷1.20.125×[(2....
算一算. 21.36÷0.8-12.9 7.28+3.2÷2.5 5.6×13-3×5.6 10.8×0.8÷0.27 [48-(2.48-1.28)]÷1.2 0.125×[(2.8+6.8)÷2.4].
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=7.28+1.28 =8.56; (3)5.6×13-3×5.6 =5.6×(13-3) =5.6×10 =56; (4)10.8×0.8÷0.27 =8.64÷0.27 =32; (5)[48-(2.48-1.28)]÷1.2 =[48-1.2]÷1.2 =46.8÷1.2 =39; (6)0.125×[(2.8+6.8)÷2.4] =0.125×[9.6÷2.4] =0.125×4 =0.5. |
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