原来有多少个?
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+6.1 0.36×10120﹣(5.6+4.8)÷1.3 3.2×(2.15+1.95÷6.5) (+)÷+36×(+﹣)
能简算的要简算5.7×1.4+1.4×4.3 9.05﹣3.86﹣3.14 6.84×10.187×2.5+8.7×75.
1.59×1.9+0.41×1.9﹣1.918.6﹣[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.