一、口算。结果请用最简分数表示。
11112141732+3= 2-4= 5-5= 7-7= 8-8=
125213121110+ 5= 6-3= 3+5= 8-4= 3+3=
5591421112-12= 10-10= 5-5= 6+ 3= 33114378+8= 2-5= 7+7= 1-8= 53193551-12= 5+2= 10-10= 7-7= 171331916+12= 4+4= 7+2= 10-2= 59 +89 = 1719138 +8 = 24 -24 = 34111117 +7 = 8 -8 = 4 -9 = 84119 +11 +9 = 1-6 -16 = 3114 +4 +4 = 11 2-8=
55 6+6=
35 8+8=
93 10-5=
1936 +3
36
= 1213 -313
= 78 -338 +8
=
+= -= +=
-= += -=
二、计算(能简算的要简算)。
(1)58 -310 +14 (2)1-1531124 +48 (3)4 +25 -12
(4)53215422332
5 -23 +36 (5)7 -15 +7 -15 (6)4 -﹙4 -3
﹚(7)2-18 -78 (8)+538 -334 (9)411
5 -4 +3
(10)9 +3 -3 (11)7
327135
1020151-12 +4 (12)28 +﹙14 -7
﹚(13)2527115511
6 -﹙3 +12 ) (14)154 -52 +76 (15)16 -﹙33 -12
﹚
32
(16)+ (17)8+15+8 (18)6+4-3
3
12751111173731
(19) - ( + ) (20)11- - (21) - ( - )
126810101242
12 -(34 -3
8
) 1711-18-18 7
10 -38 -18 11- 7310 - 10 12 -(34 -38 )
3514215424+7+2 5+3+5 17-51+3 73311158 10-(7-10) 12+16+15 531
12 +4 +12
1275318+15+8 6+4-3 1111
12 - ( 6 + 8
) 7
12 - ( 34 - 12 ) 1332 -(4 -8
)
56 -(132513 +10 ) 3 +6 - 6
8
284237111
45 -(30 +8 ) 4 +6 +5 + 15 -3 -2 1151179792545445713
+1 + + 24-(7 +12 ) 2 -1 + 959912416
1511
(1)3x- =1 (2)-x=2 (3)4 +x=5
6643
31344
(4)3 -x=1 (5)3x- =2- (6)X-4=8
4855
5
221312
73(7)X+= (8)X - = (9) +X=
17 +x=23 6
45 -x=14 8
x-16 =38 53
15 +X=2
3
223513
X-4=8 X+7=3 X - =
68
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