1.45+15×6= 135

2.250÷5×8=400

3.6×5÷2×4=60

4.30×3+8=98

5.400÷4+20×5= 200

6.10+12÷3+20=34

7.(80÷20+80)÷4=21

8.70+(100-10×5)=120

9.360÷40+10= 19

10.40×20-200= 600

11.（80-25）*2= 110

12.70+45=115

13.90×2÷3= 60

14.16×6÷3= 32

15.300×6÷9= 200

16.540÷9×7=420

17.30×20÷15= 20

18.400÷4×7= 700

19.（350-80）÷9= 30

20.160+70+50=280

21.18-64÷8= 10

22.42÷6+20=27

23.40-5×7= 5

24.80+60÷3=100

25.41+18÷2= 50

26.75-11×5= 20

27.42+7-29= 20

28.5600÷80=70

29.25×16÷4= 100

30.120×25÷5= 600

31.36×11÷3= 132

32.1025÷25×8=328

33.336+70-6= 400

34.25×9×4= 900

35.200-33×3= 101

36.3020-1010=2010

37.12×50+10= 610

38.25×8+199= 399

39.23×11-13= 240

40.125÷25-5=0

41.4200-2200+200=2200

42.220+80-150=150

43.20×8×5= 800

44.600-3×200=0

45.20+20÷2= 30

46.35-25÷5= 30

47.36+8-40= 4

1）25%*132+1/4*8 2)32*0.125*25

=1/4*132+1/4*8 =(4+8)*0.125*25

=1/4*(132+8) =(4*25)*(8*0.125)

=1/4*140 =100*1

=35 =1000

3)75%*76+25*4+0.75*12

=3/4*76+3/4*12+25*4

=3/4*88+100

=166

4)3200*1/8÷2/5+1270 5)(2/3+4/5)*7/6

=400*5/2+1270 =22/15*7/6

=1000+1270 =77/45

=2270

5)6*(1/2+2/3) 6)132*(44÷176)

=6*1/2+6*2/3 =132*1/4 =33

=3+4

=7

7)72.25%*99+75.25%

=75.25%*99+75.25%*1

=75.25%*(99+1)

=75.25%*100

=75.25

①2700×（506－499）÷900 ②33.02－（148.4－90.85）÷2.5

=2700×7÷900 =33.02－57.55÷2.5

=18900÷900 =33.02－23.02

=21 =10

③（1÷1－1）÷5.1 ④18.1＋（3－0.299÷0.23）×1

=（1－1）÷5.1 =18.1＋1.7X1

=0÷5.1 =18.1＋1.7

=0 =19.8