a)-|-33|+(-12)+18+|45-40|-57
b)|40-37|-|13-52|
a)|0|+|45|+(-|-455)|+|796|
b)-|-33|+(-12)+18+|45-40|-57
c)|40-37|-|13-52|
a)|0|+|45|+(-|-455)|+|796|
= 0+45+(-455)+796
=45-455+796
=-410+796
=386
b)-|-33|+(-12)+18+|45-40|-57
=-33-12+18+|5|-57
=-45+18-5-57
=-33-5-57
=-38-57
=-95
c)|40-37|-|13-52|
=|13|-|-39|
=13-39
=-38
| 0 | + | 45 | +( - | - 455 ) | + | - 796 |
- | - 33 | + ( - 12 ) + 18 + | 45 - 40 | - 57
| 40 - 37 | - | 13 - 52 |
Làm nhanh mk k !
|0| + |45| + (-|-455)| + |-796|
= 0 + 45 - 455 + 796
= 386
-|-33 | + (-12) + 18 + |45 - 40| - 57
= -33 - 12 + 18 + 5 - 57
= -79
|40 - 37| - |13 - 52|
= |3| - |-39|
= 3 - 39
= -36
a,(-123)+|-13|+(-7)
b,-|-33|+(-15)+20-|45-40|-57
c,9.|40-37|_2.13-52|
d,12+15+18+...+90
e,140:{80-[130-(12-4)^2]}
giúp mk với
\(\text{(-123) +|–13| +(-7)}\)
\(\text{= (-123) + 13 + (-7)}\)
\(\text{= (-110) + (-7)}\)
\(=\text{(-117)}\)
b
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50+51+52+53+54+56+57+58+59+60+61+62+63+64+65+66+67+68+69+70=?
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50=?
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50=1275
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50.
Có ai rảnh đâu mà đi ngồi cộng ngần đấy số ra.
11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40
11 + 12 + 13 + ... + 40
số số hạng : ( 40 - 11 ) : 1 + 1 = 30
tổng : ( 40 + 11 ) x 30 : 2 = 765
đáp số : 765
bn ơi kết quả là 765 bn nhé!!
đúng 100%
chúc bn học tốt nhé
ℓ. 500 – {5[409 – (2³.3 – 21)²] + 10³} : 15 m. 67 – [8 + 7.3² – 24 : 6 + (9 – 7)³] : 15
n. (–23) + 13 + (–17) + 57 o. (–123) + |–13| + (–7) p. |–10| + |45| + (–|–455|) + |–750|
q. –|–33| + (–15) + 20 – |45 – 40| – 57. h. 9.|40 – 37| – |2.13 – 52|
ℓ. 500 – {5[409 – (2³.3 – 21)²] + 10³} : 15
= 500 - {5[409-(8.3-21)2]+103}:15
= 500-{5[409-(24-21)2]+1000}:15
= 500-{5[409-32]+1000}:15
= 500-{5[409-9]+1000}:15
= 500-{[5.400]+1000}:15
= 500-{2000+1000}:15
= 500-3000:15
= 500-200
= 300
m. 67 – [8 + 7.3² – 24 : 6 + (9 – 7)³] : 15
= 67 – [8 + 7.9 – 4 + 23] : 15
= 67 – [8 + 63 – 4 + 8] : 15
= 67 – [71 – 4 + 8] : 15
= 67 – [67 + 8] : 15
= 67 – 75 : 15
= 67 – 5
= 62
n. (–23) + 13 + (–17) + 57
= (–10) + [(–17) + 57]
= (–10) + 40
= 30
o. (–123) + |–13| + (–7)
= [(–123) + (–7)] + |–13|
= (–130) + 13
= (–117)
p. |–10| + |45| + (–|–455|) + |–750|
= 10 + 45 + (–455) + 750
= (10 + 45 + 750) + (–455)
= 805 + (–455)
= 350
q. –|–33| + (–15) + 20 – |45 – 40| – 57 = (–33) + (–15) + 20 – |5| – 57 = (–48) + (20 + 5 + 57) = (–48) + 82 = 34 h. 9.|40 – 37| – |2.13 – 52| = 9.|3| – |26 – 52| = 9.3 – |–26| = 27 – 26 = 1