巧解密码:(1)(3X+2)+2[(X﹣1)﹣(2X+1)]=6(2)若X:7.5=0.16:,求75X+8的值.
脱式计算:(能简算的要简算)①2.4×1.5+3.6÷1.5②0.32×0.25+0.08÷4③7.38﹣5.14+3.62﹣2.86④5.4÷[0.51÷(1.2﹣1.03)].
能简便的用简便方法计算.0.88×4.9+5.1×0.88 2.5×8×0.4×0.125 0.65×20121.36÷0.8﹣12.9 0.25×1.25×3.2 7.28+3.2÷2.5.
怎样算简便就怎样算3.35﹣1.1+0.75﹣1.9 4.2×9.9+0.42 (74﹣3.6)÷2.5÷4 307×10.1.
脱式计算,能简便运算的要简便运算.5.86+13.08﹣9.27 25.4﹣(15.4﹣6.4) 21+187÷17×11 115×6﹣6×5(118﹣75)×(475÷25) 23×201﹣23 99×98 395×99+2×395﹣395.
能简算的要简算86.2÷12.5÷0.8 23.6×1.25﹣23.6×0.252.3+9.2÷(22﹣19.7) 3.4÷[(1.2+0.5)×5].