请看下图,共有多少个圆圈?
2.4×7.6+7.6×6.5+7.6+0.76.
计算: (1)13.7×6.5+5.9×13.7﹣12.4×3.7= (2)50×[(0.2+4.8﹣4.8+0.2)÷2]=
×125××8++×24 ×(﹣)÷ 3÷+3÷7+8.9+2+6.10.36×101 20﹣(5.6+4.8)÷1.33.2×(2.15+1.95÷6.5)(+)÷+ 36×(+﹣)
能简算的要简算 5.7×1.4+1.4×4.39.05﹣3.86﹣3.146.84×10.187×2.5+8.7×75.
1.59×1.9+0.41×1.9﹣1.9 18.6﹣[12﹣0.328×(18.3+6.7)] 63÷[6.5×(3.4﹣3.32)+2.98] 96.12÷[(7﹣6.46)×(43.6+56.4)] [49.84﹣(53.17﹣14.56)÷27]÷0.47.