36×45= 2.6+12.75= 78×22= 87×21=
脱式计算(能简算的要简算)﹣(+) [1﹣(+)]÷ ×58+×42××﹣ ×6+÷ 180÷2.5÷4.
计算(1)﹣(0.375×45+1÷3.75÷1.6)÷0.4 (2)(7﹣6)÷[2+(4﹣2)÷1.35].
57.26﹣(5.26﹣1.5) 64×1.25×2.5 (+)÷ 4.8×3.9+6.1×412×(+﹣) (+)÷+ 34.5×9.23﹣34.5+1.77×34.5 2﹣÷﹣.
计算下面各题,能简算的要简算.①[3.2×(1﹣58 )+335]×2112 ②137+2415+447+3215③4397×99 ④1.8×25%+2.2×25%
脱式计算.(怎样简便怎样算)51.7+46.05÷1.5﹣9.3 857×1.9﹣8.57×80﹣85.7 ÷((+)×) 27×(+)×25 45×(+﹣) ÷(4÷)+.