将意义相同的式子用线连起来.
计算下面各题.(能简算的要简便计算)7.8×9.8﹣14.5 13.4+5.62+17.6+4.38 3.6×42+4.2×644.8×12.5×0.8 1.76﹣[(0.74+0.26)÷0.8] (1.89+1.4×3)÷0.25.
计算下面各题,能简算的要简算.8.56×2.7+1.44×2.7 1.25×2.5×4×0.8 (1.79+1.2×0.1)÷0.25 5.8÷[8×(1.8﹣1.3)].
用你喜欢的方法计算25.74﹣3.57﹣6.43 12.5×3.4×8 14.5﹣4.68﹣5.32(20﹣1.4÷2)×0.4 3.5÷〔(0.45﹣0.38)×0.01〕
怎样算简便就怎样算.0.485+0.64+3.36 72.51﹣9.34﹣12.6614.02﹣4.5+0.98 5.76+2.43+0.24+10.57182+99×182 9.28﹣(3.28+2.55)9.5+4.85﹣6.13 10.75﹣1.86﹣2.75﹣3.16.
用递等式计算,怎样算简便就怎样算:①8.4×0.26+0.74 ②23.4÷7.8﹣2.1 ③0.25×13.2×4④2.65×1.7+13.5×0.17 ⑤0.78÷0.25×4 ⑥0.8×(3.2﹣3.2÷1.6)