(广州校级自主招生)如图中,三角形的个数有多少?
用简便方法计算.1.25×3.2×0.8 14.5×102 4.38÷0.125÷0.8 6.4×4.5+3.6×4.5.
怎样算简便就怎样算5.5×17.3+6.7×5.5 4×3.09×0.25 9.07﹣22.78÷3.4.
简便计算.9.6+1.8﹣1.6 0.21+3.48+0.89+2.52 15.3﹣(0.91+2.3)
用简便方法计算(1)0.75×14+0.25×14 (2)25×9.26×4(3)99×2.45 (4)9.85×2.3+8.85×2.3.
用简便方法计算.73×103﹣3×73 125×(8×16) 75×99+75.