a: =274+184=458
b: =29+132+868+237+163
=1000+400+29
=1429
f: =A*135*137(1001-1001)=0
e: =24*25+24*37+24*38
=24*100=2400
c: =31(98+2)=31*100=3100
Tính nhanh
29+132+237+868+736
3.25.8+4.37.6+2.38.12
1. (-12)+(-15)+(-31) | 2. 25+37-59 | 3. (-12)+13-(-60)
4. 24:(-2)+(-5) | 5. 32.(-2)+64 | 6. 18.3+(-50):5
7. (-24)+37+163+(-176) | 8. 125+217+(-625)+529 | 9. 29+132+237+868+763
10. (-87)+126+187+74 | 11. 29.87+29.13 | 12. 123.(-29)-23.(-29)
13. 31.(-18)+31.(-81)-31 | 14.(-12).47+(-12).52+(-12) | 15. 24.(16-5)-16.(24-5)
16. 29.(29-3)-19.(29-13) | 17. -452-(-67+75-452) | 18. -(-171+89+223)-(71-111)+223
19. 21.83-3.7.(-17) | 20. 35-{12-[-14+(-2)]} | 21.5+10+15+20+....+1000
22. 3-6+9-12+....+195-198
Tính nhanh:
a) 246+58+54+242
b)11+12+13+....+17+18+19
c)64.16+81.84+17.16
d)3.25.8+4.37.6+2.38.12
tinh nhanh
a, 4.7.76+8.24
b,136.48+16.272+68.20.2
c,3.25.8+4.36.6+2.38.12
d,10+11+12+13+....+99
e,1+6+11+16+....+46+51
Tính nhanh:
a) 23.56 + 56.77;
b) 32.19 + 32;
c) 35.34 + 35,86 + 65.75 + 65.45;
d) 43.17 + 29.57 + 13.43 + 57;
e) 3.25.8+4.37.6 + 2.38.12
f) 64.16+81.84+17.16
Tính nhanh:
a) 23.56 + 56.77;
b) 32.19 + 32;
c) 35.34 + 35,86 + 65.75 + 65.45;
d) 43.17 + 29.57 + 13.43 + 57;
e) 3.25.8+4.37.6 + 2.38.12
f) 64.16+81.84+17.16
mn giup minh nha
tinh nhanh
a, 35.34+35.86+65.75+65.45
b, 10+11+12+13+........+ 99
c,(1+3+5+7+....+2017).(135135.137 + 135.137137)
cam cac ban da giup minh
a) 185 + 434+ 515 + 266 + 155
b) 652 + 327 + 148 + 15 + 73
c) 5 . 125 . 2 . 1 . 8
d) 8.12.125.2
e) 3.25.8.+4.37.6+2.38.12
tính nhanh :
a, 23,56 + 56,77
b, 32,19 + 32
c, 35,34 + 35,86 + 65,75 + 65,45
d, 43,17 + 29,57 + 13,43 + 57
e, 3.25.8 + 4.37.6 + 2.38.12
f, 64,16 + 81,84 + 17,16
