分数加减法练习题计算题
- 格式:doc
- 大小:245.50 KB
- 文档页数:3
一、口算。结果请用最简分数表示。
21+31= 21-41= 52-51= 74-71= 87-83
= 101+ 52= 65-32= 31+51= 83-41= 32+31
= 125-125= 109-101= 54-52= 61+ 31= 21-81= 83+83= 21-51= 74+73= 1-87= 65+6
5= 1-125= 53+21= 109-103= 75-75= 83+85=
61+127= 41+43= 73+21= 109-21= 109-5
3= 59 +89 = 18 +78 = 1924 -1324 = 1936 +336 = 37 +47 = 118 -18 = 14 -19 = 1213 -313 = 89 +411 +19 = 1-16 -16 = 34 +14 +14 = 78 -38 +38 =
+= -= += -
=
+=
-=
二、计算(能简算的要简算)。
(1)58 -310 +14 (2)1-124 +548 (3)34 +215 -112 (4)535 -223 +316 (5)57 -415 +27 -215 (6)34 -﹙34 -2
3 ﹚ (7)2-18 -78 (8)+538 -33
4 (9)4
5 -14 +1
3 (10)910 +320 -315 (11)1-712 +3
4 (12)2728 +﹙1314 -5
7 ﹚ (13)256 -﹙23 +712 ) (14)1514 -512 +756 (15)156 -﹙313 -11
2 ﹚
(16)+2
3 (17)81+152+8
7 (18)65+4
3-3
1
(19)1112 - ( 16 + 18 ) (20)11- 710 - 310 (21)712 - ( 34 - 1
2 ) 12 -(34 -38 ) 43+75+21 54+32+5
1 175-514+3
2 1-1817-181 10
7-(73-103) 1211+1615+158
512 +34 +112
710 -38 -18 81+152+87 65+43-3
1 111
2 - ( 16 + 1
8 ) 11- 710 - 310 712 - ( 34 - 12 ) 12 -(34 -3
8 ) 12 -(34 -38 ) 56 -(13 +310 ) 23 +56 - 16
45811 -(3025 +8811 ) 447 +629 +537 +79 1512 -315 -21
4 +159 +4
5 +49 24-(759 +12712 ) 214 -131
6 +
(1)3x -16 =156 (2)-x =214 (3)41
3 +x =5
(4)314 -x =138 (5)3x -45 =2-45 (6)X -43=8
5
(7)X+
72=3
2 (8)X -16 =38 (9)15 +X=23
17 +x=23 45 -x=14 x-16 =38 15 +X=23
X -
43=8
5 X+72=32 X -1
6 =3
8