用加法算: + + + =用乘法算: × = .
计算.(能用简便方法的要用简便方法)(1)7.9×4.9+5.1×7.9 (2)18×(+)÷45(3)(++)×48 (4)1﹣(+)÷.
×(+1÷) ×+÷8 10.15﹣6.25﹣3.75+7.85.
19.98×37﹣199.8×1.9+1998×0.82 888+32×0.125×0.257.8÷[32×(1﹣)+3.6] +++…+.
(2013•雨花台区模拟)看谁都能算对!(能简算的请写出简算过程) 624﹣3.2×1.5÷0.1 9.43+0.78﹣2.43 +(+)× ×5+÷ ﹣[(+)÷].
计算,能用简便计算的用简便计算.8×4×12.5×0.25 8.7×2.9+71×0.87÷[(﹣)×24] (+﹣)×12.