笑笑和爸爸、妈妈、爷爷、奶奶去海洋世界,往返交通费要用多少钱?(注:单程票价每人12.5元,儿童半价)
简便计算12.5×(0.7×0.8) 6.25×1.02 1.25×9912.5×32×2.5 4.12﹣1.78﹣1.22 4.2÷0.7÷6.
0.46×7.5+0.46×2.53﹣7.14÷3.5×1.059.9×8.6+0.86[20﹣(90.75÷6.6+2.25)]×11.6.
7.02×900×0.60.035÷0.7÷0.513.6﹣13.6×0.75.62+3.1×0.6+3.38(25﹣1.25×5)÷2.58.1×0.3+1.8×0.3+0.03.
199×0.61 2.5×3.7+4.3×2.5 0.8×62.3×12.55.2×10.1 0.25×13.7×0.4 2.5×40.4.
(1)60.28+0.72×4.3(2)6.37﹣0.37×16(3)3.8×99(4)2.5×9×0.4×1.1(5)2.6×(10.6﹣9.72)(6)1.25×888.