初一数学题70道

64+28+36+72

90-（72-70）=90-2=88

42+（33+7）=42+40 =82

78-（36-6）=78-30=48

75-20+40 =55+40=95

88-8+60 =80+60 =140

70-（48+2）=70-50=20

(45-17)+(9-3)=28+6=34, (45-17)+(9-6)=28+3=31, (45-18)+(9-3)=27+6=33

(45-18)+(9-6)=27+3=30, (45-27)+(9-3)=18+6=24, (45-27)+(9-6)=18+3=21

(45-28)+(9-3)=17+6=23, (45-28)+(9-6)=17+3=20, (46-17)+(8-3)=29+5=34

(46-17)+(8-5)=29+3=32, (46-19)+(8-3)=27+5=32, (46-19)+(8-5)=27+3=30

(46-27)+(8-3)=19+5=24, (46-27)+(8-5)=19+3=22, (46-29)+(8-3)=17+5=22

(46-29)+(8-5)=17+3=20, (54-16)+(9-2)=38+7=45, (54-16)+(9-7)=38+2=40

(54-18)+(9-2)=36+7=43, (54-18)+(9-7)=36+2=38, (54-36)+(9-2)=18+7=25

(54-36)+(9-7)=18+2=20, (54-38)+(9-2)=16+7=23, (54-38)+(9-7)=16+2=18

(57-18)+(6-2)=39+4=43, (57-18)+(6-4)=39+2=41, (57-19)+(6-2)=38+4=42

(57-19)+(6-4)=38+2=40, (57-38)+(6-2)=19+4=23, (57-38)+(6-4)=19+2=21

(57-39)+(6-2)=18+4=22, (57-39)+(6-4)=18+2=20, (63-15)+(9-2)=48+7=55

(63-15)+(9-7)=48+2=50, (63-18)+(9-2)=45+7=52, (63-18)+(9-7)=45+2=47

(63-45)+(9-2)=18+7=25, (63-45)+(9-7)=18+2=20, (63-48)+(9-2)=15+7=22

(63-48)+(9-7)=15+2=17, (64-25)+(8-1)=39+7=46, (64-25)+(8-7)=39+1=40

1.(1+1/2)(1+1/3)(1+1/4)......(1+1/100)

2.(1-1/2)(1-1/3)(1-1/4)......(1-1/100)

3.8+2-8+2

4.25*4/25*4

5.7.26-(5.26-1.5)

6.286+198

7.314-202

8.526+301

9.223-99

10.6.25+3.85-2.125+3.875

11.9-2456*21

12.0.5/11.5-4*2.75

13.1/2×3/5

14.3.375+5.75+2.25+6.625

15.1001－9036÷18

16.3.8×5.25+14.5

17.2.1*4.3+5.7*2.1

18.30×1/3

19.102*45-328

20.2/3×12

21.2.8*3.1+17.6/8

22.3/5×5/6

23.(50-12.5)/2.5

24.2/5×1/3

25.6110*47+639

26.1/2-1/6

27.3.5*2.7-52.2/18

28.1/7×1/5

29.3.375*0.97+0.97*6.625

30.25×4/5

31.6.54+2.4+3.46+0.6

32.5/6-1/2

33.95.6*1.8+95.6*8.2

34.1/2×1/5

35.600-420/12

36.344/3.6-5.4*0.25

37.16/2+30/2+90/6

38.3001-1998.

39.5000-105*34

40.0.15/0.25+0.75*1.2

(1)2x+8=16

(2)x/5=10

(3)x+7x=8

(4)9x-3x=6

(5)6x-8=4

(6)5x+x=9

(7)x-8=6x

(8)4/5x=20

(9)2x-6=12

(10)7x+7=14

(11)6x-6=0

(12)5x+6=11

(13)2x-8=10

(14)1/2x-8=4

(15)x-5/6=7

(16)3x+7=28

(17)3x-7=26

(18)9x-x=16

(19)24x+x=50

(20)6/7x-8=4

(30)3x-8=30

(31)6x+6=12

(32)3x-3=1

(33)5x-3x=4

(34)2x+16=19

(35)5x+8=19

(36)14-6x=8

(37)15+6x=27

(38)5-8x=4

(39)7x+8=15

(40)9-2x=1

(41)4+5x=9

(42)10-x=8

(43)8x+9=17

(44)9+6x=14

(45)x+9x=4+7

(46)2x+9=17

(47)8-4x=6

(48)6x-7=12

(49)7x-9=8

(50)x-56=1

(51)8-7x=1

(52)x-30=12

(53)6x-21=21

(54)6x-3=6

(55)9x=18

(56)4x-18=13

(57)5x+9=11

(58)6-2x=11

(59)x+4+8=23

(60)7x-12=8

(61)X-5.7=2.15

(62)15 5X-2X=18

(62)3X 0.7=5

(63)3.5×2= 4.2 x

(64)26×1.5= 2x

(65)0.5×16―16×0.2=4x

(66)9.25－X=0.403

(67)16.9÷X=0. 3

(68)X÷0.5=2.6

(69)x＋13＝33

(70)3 － 5x＝80

(71)1.8- 6x＝54

(72)6.7x －60.3＝6.7

(73)9 ＋4x ＝40

（74）0.2x－0.4＋0.5＝3.7

（75）9.4x－0.4x＝16.2

（76）12 －4x＝20

（77）1/3 x＋5/6 x＝1.4

（78）12 x＋34 x=1

（79）18x－14 x= 12

（80）23 x－5×14 = 14

（81）12 ＋34 x=56

（82）22－14 x= 12

（83）23 x－14 x= 14

（84）x＋14 x= 65

（85）23 x=14 x ＋14

（86）30 x－12 x －14 x=12

0.4×125×25×0.8

=（0.4×25）×（125×0.8)

=10×100=1000

1.25×（8+10）

=1.25×8+1.25×10

=10+12.5=22.5

9123-（123+8.8）

=9123-123-8.8

=9000-8.8

=8991.2

1.24×8.3+8.3×1.76

=8.3×（1.24+1.76)

=8.3×3=24.9

9999×1001

=9999×（1000+1）

=9999×1000+9999×1

=10008999

14.8×6.3-6.3×6.5＋8.3×3.7

=（14.8-6.5）×6.3＋8.3×3.7

=8.3×6.3+8.3×3.7

8.3×（6.3＋3.7）

=8.3×10

=83

1.24+0.78+8.76

=（1.24+8.76）+0.78

=10+0.78

=10.78

933-157-43

=933-（157+43）

=933-200

=733

4821-998

=4821-1000+2

=3823

I32×125×25

=4×8×125×25

=（4×25）×（8×125）

=100×1000

=100000

9048÷268

=（2600+2600+2600+1248）÷26

=2600÷26+2600÷26+2600÷26+1248÷269

=100+100+100+48

=348

2881÷ 43

=（1290+1591）÷ 434

=1290÷43+1591÷43

=30+37

3.2×42.3×3.75-12.5×0.423×16

=3.2×42.3×3.75-1.25×42.3×1.6

=42.3×(3.2×3.75-1.25×1.6)

=42.3×(4×0.8×3.75-1.25×4×0.4)

=42.3×(4×0.4×2×3.75-1.25×4×0.4)

=42.3×(4x0.4x7.5-1.25x4x0.4)

=42.3×[4×0.4×(7.5-1.25)]

=42.3×[4×0.4×6.25]

=42.3×(4×2.5)

=4237

1.8+18÷1.5-0.5×0.3

=1.8+12-0.15

=13.8-0.15

=13.65

6.5×8+3.5×8-47

=52+28-47

=80-47

(80-9.8)×5分之2-1.32

=70.2X2/5-1.32

=28.08-1.32

=26.76

8×7分之4÷[1÷(3.2-2.95)]

=8×4/7÷[1÷0.25]

=8×4/7÷4

=8/7

2700×（506－499）÷900

=2700×7÷900

=18900÷900

=21

33.02－（148.4－90.85）÷2.5

=33.02－57.55÷2.5

=33.02－23.02

=10

（1÷1－1）÷5.1

=（1－1）÷5.1

=0÷5.1

=0

18.1＋（3－0.299÷0.23）×1

=18.1＋1.7×1

=18.1＋1.7

=19.8

这个行吗？