7.5-(2.5+3.8)= 1.2,

4/5 - 7/ 10 = 1/ 10,

2 - 1/6 - 1/3 = 1.5

0.5 1÷ 17=0.03,

32.8+ 19=5 1.8,

5.2÷ 1.3=4,

1.6×0.4= 0.64

4.9×0.7=3.43,

25*4/25*4

7.26-(5.26- 1.5)

286+ 198

3 14-202

526+30 1

223-99

6.25+3.85-2. 125+3.875

9-2456*2 1

0.5/ 1 1.5-4*2.75

1/2×3/5

3.375+5.75+2.25+6.625

100 1-9036÷ 18

3.8×5.25+ 14.5

2. 1*4.3+5.7*2. 1

30× 1/3

102*45-328

2/3× 12

2.8*3. 1+ 17.6/8

3/5×5/6

( 50- 12.5)/2.5

2 /5× 1/3

6 1 10*47+639

1 /2- 1/6

3.5*2.7-52.2/ 18

1/ 7× 1/5

3.375*0.97+0.97*6.625

25 ×4/5

6.5 4+2.4+3.46+0.6

5/6 - 1/2

95.6 * 1.8+95.6*8.2

1/2× 1/5

35.600- 420/ 12

36.344/ 3.6-5.4*0.25

37. 16/2+30/2+90/6

38.300 1- 1998.

39.5000- 105*34

40.0. 15/0.25+0.75* 1.2

4 1.( 1/2+ 1/3+ 1/4)*0.24

42.(25+4)*4

43.300-4263/2 1

44.0.8 1/0.25+5.96

45.403÷ 13×27

46. 1.5×4.2-0.75÷0.25

47.3.27×4 +3.27×5.7

48.( 1.2+ 1.8)×4.5 1025-768÷32

49.0.25×80-0.45÷0.9

50 。 7/8 + 3/8 =5/4