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Find the math oral calculation questions in the second volume of the fifth grade of primary school. (difficult)
( 1) 103÷73- 159-57=

(2) 83×9 1÷ 13 1+38=

(3) 197-46+67- 13=

(4) 38÷54× 126-52=

(5) 192+52× 136÷66=

(6) 123-47+ 159- 16=

(7) 164×23- 126+74=

(8) 1 17+2 1+ 17- 19=

(9) 7÷9× 16 1+93=

( 10) 93×35- 128+36=

( 1 1) 86×9× 187×99=

( 12) 68÷83- 14÷54=

( 13) 80÷93+ 15- 17=

( 14) 5 1+20÷ 143-90=

( 15) 42+3 1× 180+42=

( 16) 96÷82- 173×25=

( 17) 42÷ 12× 180-66=

( 18) 152- 18÷ 10× 19=

( 19) 16-69÷ 137×5=

(20) 109÷9-5 1÷45=

(2 1) 23+ 15+37÷ 18=

(22) 52+95÷37÷ 12=

(23) 88×5 1+ 188÷40=

(24) 1 12×3- 103×82=

(25) 56-7-66- 1=

(26) 109×66-29× 10=

(27) 39+55- 166-52=

(28) 1 1÷55÷86÷5 1=

(29) 7 1-42+50×92=

(30) 177÷97-92÷4=

(3 1) 15 1×9÷ 1+93=

(32) 13×7÷56× 18=

(33) 99-2 1+70-22=

(34) 14×5÷33-34=

(35) 4÷90- 125+67=

(36) 24-48- 170÷97=

(37) 73÷98- 106+66=

(38) 76+53÷ 158+9 1=

(39) 8 1-28÷69+27=

(40) 50+20×83÷56=

(4 1) 23÷78-40×54=

(42) 1 18-58+73- 17=

(43) 16 1÷98÷64+75=

(44) 198× 12÷ 152-9=

(45) 80× 12÷54-64=

(46) 198-85×85- 1=

(47) 128+33÷42+66=

(48) 73×66+33-2 1=

(49) 75×3÷28+24=

(50) 7 1-5 1+ 199-83=

1.3/7 × 49/9 - 4/3

2.8/9 × 15/36 + 1/27

3. 12× 5/6 – 2/9 ×3

4.8× 5/4 + 1/4

5.6÷ 3/8 – 3/8 ÷6

6.4/7 × 5/9 + 3/7 × 5/9

7.5/2 -( 3/2 + 4/5 )

8.7/8 + ( 1/8 + 1/9 )

9.9 × 5/6 + 5/6

10.3/4 × 8/9 - 1/3

1 1.7 × 5/49 + 3/ 14

12.6 ×( 1/2 + 2/3 )

13.8 × 4/5 + 8 × 1 1/5

14.3 1 × 5/6 – 5/6

15.9/7 - ( 2/7 – 10/2 1 )

16.5/9 × 18 – 14 × 2/7

17.4/5 × 25/ 16 + 2/3 × 3/4

18. 14 × 8/7 – 5/6 × 12/ 15

19. 17/32 – 3/4 × 9/24

20.3 × 2/9 + 1/3

2 1.5/7 × 3/25 + 3/7

22.3/ 14 ×× 2/3 + 1/6

23. 1/5 × 2/3 + 5/6

24.9/22 + 1/ 1 1 ÷ 1/2

25.5/3 × 1 1/5 + 4/3

26.45 × 2/3 + 1/3 × 15

27.7/ 19 + 12/ 19 × 5/6

28. 1/4 + 3/4 ÷ 2/3

29.8/7 × 2 1/ 16 + 1/2

30. 10 1 × 1/5 – 1/5 × 2 1

You can look online again. Basic calculation in primary schools is very important.