精品文档---下载后可任意编辑计算下面各题: (1–16 ×25 )÷7917 ÷23 ×71112 –(19 +512 ) 425 ×34 –15025÷(78 –56 ) 815 +23 –34 (56 –34 )÷(23 +49 ) 15 ×[13 ÷(12 +56 )] 12÷(1–37 ) [(1–16 ×25 )]÷79 [(1–35 )×25 ]÷4用简便方法计算: (15 –17 )×70 97×59635 ×8+35 ×2 15×37 +15×47 (89 +34 –23 )×72 72×(12 –13 +14 )(59 +113 )×9+413 30×(12 –13 +16 )12×(12 –13 +14 ) 15 +49 ×38 +564–25 ÷815 –14 48×(13 –12 +14 )625 ÷9+625 ×89 24×(16 +18 ) (35 +14 )×60–27 5–16 –56用简便方法计算:89 ×(9+34 )–2378 ÷23 +78 ×1245 +58 ÷14 +12 2–89 ×34 –1330×(16 +25 –12 ) 78 +23 ÷45 +1610÷101011 +24112 ÷12 45 ×13 ×13 +1÷34直接写出得数
125= 555×13-111×15= 25××0
25= 125-25+75= 999×15= 10-3
25+9÷0
125=55×(133 -144 )= 20032004 ×2024= 10713 -(414 +3713 )-0
75=解方程:518 +X = 1112 2X–19 = 893X–×2=1
1 X+23 –12 =1718–3x = 1
75 X+35 = 710解方程:1225 X = 15×35 X×(16 +38 )= 1312X×(1+14