分数加减混合运算习题

通分计算,在算式的下面写上通分过程

710 - 15 = 13 - 524 = 57 + 514 = 23 + 1

4 = 65-54=

59 - 25 = 14 + 15 = 58 + 13 = 45 + 2 = 1 - 2

7 =

92+95= 72+75= 85+81= 65-61= 107-10

1=

97-92= 51+53= 1211-129= 1- 53= 74-7

1=

87-83= 54+53= 53-53= 85+3

1

= 21+51=

43+71= 41+83= 74-61= 51+81= 87-6

5

=

92+21= 76-32= 103+4

1= 73+91= 31-51=

61+41= 75-51= 7-75= 51+83 = 1514-3

1=

43+6

5

= =-5141 =+7473 =+4543 =-4187

=-9295 =+731 =-6151 =+158154 =-1312

5

78 +12 = 14 +13 = 45 -23 = 5-1

4 = =+8185

56 +49 = 710 -15 = 35 -14 = 5- 4

1= 1-15 -54

=

512 + 712 = 78 + 18 = 2 + 4

9 = 4

3-0.25= 37+3

2

=

脱式计算:

521031--

8

3612423-- 15 + 35 - 45 78 - 29 + 18

58 + 45 - 38 + 15 715 + 1921 + 221 10- 712 - 5

12

87-125+61 34-(52+103) 75+41-14

9 43+63-85

95+(43+21) 101+83-52 53-(152+3

1) 6-(43-52)

54 - (81 + 41) 83 + 74 + 85 61+71+51= 61+21

-6

1=

1315 - 16 + 56 25 - 512 - 718 23 + 16 - 5

12 72 - (7

2 - 81)

解方程

2x+58 =4.625 14 + x = 11

12 20

951+χ= 8743=+x

395=χ+

X +35 = 710 X + 53 = 87 12783=+x

72+x = 2111

x + 34 = 1112 χ+73=4

3

8

743=+x

8

3+X=127 17 + 12 + x = 23 x +( 13 + 34 )=2

X -31=72 2X -51=1- 5

1

x -125 =24

7 274=-x 65

61=-x 52158=χ-

x - 316 = 5

8 72

31=-x 1)5

443(=+-x χ-

3

2 = 12 +1

4

X -

31+61=6

5 4x - 13 =2- 1

3

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