计算下面各题.①1.3﹣3.79+9.7﹣6.21 ②3.64÷4+4.36×25%③÷[+(1﹣)] ④+〔÷(+)〕
怎样算简便怎样算.÷×÷ ÷[(﹣)×3] ﹣÷3+1﹣30×(﹣) ×+÷ ÷[(+)×].
(1)(+﹣)÷ (2)÷+×+(3)148×3.7+14.8×62+1.48×10 (4)18×﹣χ=.
简算:①1.8×+2.2×25% ②102×59 ③57.5﹣14.25﹣15 ④×102.31+40×102.31.
+﹣+ +++4.56×0.27+483×0.0456+1.9×4.56+0.456×30 1﹣﹣﹣﹣﹣﹣﹣﹣.