简便方法计算:326+199 25×125×32 43×99+99
递等式计算,能简算的就简算.(1)3.7+6.3×0.5(2)21.6÷3×(20﹣19.8)(3)2.5×2.9×4×2(4)16.53﹣3.57﹣6.43(5)5.28×9.8+0.2×5.28(6)28﹣2×9.5+2.8(7)(10﹣9.2)×(2.6﹣2.1)÷5(8)1.5×[(3.6﹣0.36÷0.6)﹣5].
4.27﹣1.72+0.73﹣2.2812.83﹣(9.5+2.83)16+(5.32﹣2.16)5.6×0.1259.8×0.996.2×0.35+0.35×3.81.2×198﹣9.8×121÷(1.3×28)
下面各题怎样算简便就怎样算. 72.8÷5.6+24.9 5.8×13.7+5.8×6.3 49×101﹣492.5×32×1.25 3.9÷1.5÷2 32.7+0.14×50.
脱式计算,能简算的要简算.0.389×4×0.25 21.97÷5÷2 30.8×12.6﹣30.8×2.6 4.05÷0.81+2.4.
递等式计算,能简算的要简算.3.3+7.8×10 25.83﹣3.54﹣6.46 3.45×28+6.55×28 78×9.9+7.8.