4/3*8=6 5/3*20= 12 7/3* 14=6 8/7*40=35
4/3* 16= 12 9/5*27= 15 2/ 1*30= 15 12/7*24= 14
30/ 1*30= 1 5 1/9* 102= 18 19/9*76=36 4/9*8= 18
5/8*90= 144 99/98*99=98 3/ 14*6=28 7/ 1*28=4
10/ 1*90=9 5/3* 105=63 19/7*38= 14 5/ 1*25=5
8/ 19* 16=38 6 1/60* 122= 120 7/2*28=8 6/ 1*48=8
9/7* 18= 14 25/7* 100=28 9/5*8 1=45 8/9* 16= 18
1 1/ 14-3/ 14+ 1/8
=4.05-(2.8+0.7)
=0.55
4.05-2.8-0.7
=4.05-(2.8+0.7)
=0.55
2 12+ 198
=(200+ 12)+( 100+98)
=200+ 12+ 100+98
= 12+98+ 100+200
= 1 10+ 100+200
=4 10
13.75-(3.75+6.48)
= 13.75-3.75-6.48
= 10-6.48
=3.52
(0.75*42.7+57.3-0.573*25)/3*7972
=(0.75*42.7+57.3* 1-57.3*0.25)/3*7972
=[0.75*42.7+57.3( 1-0.25)]/3*7972
=[0.75*42.7+57.3*0.75]/3*7972
=[(42.7+57.3)*0.75]/3*7972
=75/3*7972
=25*7972
= 199300
3.45*0.6*2.8=3.45×2.8×0.6=5.796
4.02+5.4+0.98
=4.02+0.98+5.4
=5+5.4
= 10.4
5. 17- 1.8-3.2
=5. 17-( 1.8+3.2)
=5. 17-5
=0. 17
13.75-(3.75+6.48)
= 13.75-3.75-6.48
=3.52
33* 145+33*55
=( 145+55)*33
=200*33
=6600
369* 136-36*369
= 100*369
=36900
193*5 1+ 193*49
= 100* 193
= 19300
25*32
=25*4*8
=800
79* 16+79*78+79*6
=( 16+78+6)*79
= 100*79
=7900
25*32
=25*4*8
=800
193*5 1+ 193*49
= 100* 193
= 19300
369* 136-36*369
= 100*369
=36900
33* 145+33*55
=( 145+55)*33
=200*33
=6600
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=2 1
8.70+( 100- 10×5)= 120
9.360÷40+ 10= 19
10.40×20-200= 600
1 1.(80-25)*2= 1 10
12.70+45= 1 15
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
2 1. 18-64÷8= 10
22.42÷6+20=27
23.40-5×7= 5
24.80+60÷3= 100
25.4 1+ 18÷2= 50
26.75- 1 1×5= 20
27.42+7-29= 20
28.5600÷80=70
29.25× 16÷4= 100
30. 120×25÷5= 600
3 1.36× 1 1÷3= 132
32. 1025÷25×8=328
33.336+70-6= 400
34.25×9×4= 900
35.200-33×3= 10 1
36.3020- 10 10=20 10
37. 12×50+ 10= 6 10
38.25×8+ 199= 399
39.23× 1 1- 13= 240
40. 125÷25-5=0
4 1.4200-2200+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
=2 1 = 10
③( 1÷ 1- 1)÷5. 1 ④ 18. 1+(3-0.299÷0.23)× 1
=( 1- 1)÷5. 1 = 18. 1+ 1.7x 1
=0÷5. 1 = 18. 1+ 1.7
=0 = 19.8