列式计算.(1)的是多少?(2)吨的是多少吨?(3)时的是多少时?
计算,能简算的要简算.3.2×1.8+2.54 198×0.511.25×32×2.5 0.8×72.4×12.55.2×10.1 2.5×3.7+6.3×2.5.
0.46×7.5+0.46×2.5.
脱式计算,能简便的要用简便方法计算.0.36×1.5×0.4 0.05×3.2×40 26×15.7+15.7×743.78×0.5﹣0.65 3.98+13.4×0.24 (9.37+9.37+9.37+9.37)×2.5.
能简算的要用简便方法计算24.1×1.5+7.59×15 (3.7+17×0.4)÷3.5 75.36÷12﹣4.32×0.58.8×0.125 7.6×5.3+3.7×7.6 6.6÷(0.68+0.42)
脱式计算.(能简算的要简算)(1)1.25×8.37×0.8 (2)(9﹣2.35)×0.64 (3)0.25×32×12.5(4)0.15×1999+0.15 (5)0.37×1.4﹣0.4×0.37 (6)8.7×9.9.