Tính
b) 32+3−2= 56−20−4= 23+14−15=
Những câu hỏi liên quan
Tính
a) 22+36= 96−32= 62−30=
89–47= 44+44= 45−5=
b) 32+3−2= 56−20−4= 23+14−15=
a) 22+36=58 96−32=64 62−30=32
89−47=42 44+44=88 45−5=40
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56+(-32)-78+44-10
32+|-23|-57+(-23)
|-8|+|-4|-(-12)+5
126+(-20)+2004+(-106)
(-199)+(-200)+(-201)
(-4)-(-8)+(-15)+(-10)
|-13|-(-17)+(-20)-(-18)
16-(-3)+(-5)-7+12
1+2+3+4+5+6+7+7+8+9+10+11+12+13+14+45+15+16+17+18+19+20+21-56+56+48+52+78+84+54+2545+455+1454+1256-23+56+586=
1+2+3+4+....-56+56+48.......-23+56+586=6928
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Tính
1, 14/7 + 5/9 + 4/9 - 2
2, 31/25 + ( 15/16 - 6/15 ) + 2/3
3, 23/28 - ( 23/28 - 1/3 ) + 2/3
4, 1/12 + 1/20 + 1/30 + 1/42 + 1/56 + 1/72 + 1/90
Bài 5: Thực hiện phép tính:a) 47 – [(45.24 – 52.12):14]a) 3.52 + 15.22 – 26:2b) 50 – [(20 – 23) : 2 + 34]b) (- 25) . (- 4 ) + (- 70) . 3c) 102 – [60 : (56 : 54 – 3.5)]c) 62 : (- 9) - 50.2 – 33.(- 3)d) 50 – [(50 – 23.5):2 + 3]d) 32.(- 50) - 23.10 – 81: (- 3)e) 10 – [(82 – 48).5 + (23.10 + 8)] : 28e) 513 : 510 – 25.22f) 8697 – [37 : 35 + 2(13 – 3)]f) 20 : 22 + 59 : 58g) 2011 + 5[300 – (17 – 7)2]g) 100 : 52 + 7.32h) 695 – [200 + (11 – 1)2]h) 84 : 4 + 39 : 37 + 50i) 129 – 5[29 – (6 – 1)2]i) 29 –...
Đọc tiếp
Bài 5: Thực hiện phép tính:
a) 47 – [(45.24 – 52.12):14] | a) 3.52 + 15.22 – 26:2 |
b) 50 – [(20 – 23) : 2 + 34] | b) (- 25) . (- 4 ) + (- 70) . 3 |
c) 102 – [60 : (56 : 54 – 3.5)] | c) 62 : (- 9) - 50.2 – 33.(- 3) |
d) 50 – [(50 – 23.5):2 + 3] | d) 32.(- 50) - 23.10 – 81: (- 3) |
e) 10 – [(82 – 48).5 + (23.10 + 8)] : 28 | e) 513 : 510 – 25.22 |
f) 8697 – [37 : 35 + 2(13 – 3)] | f) 20 : 22 + 59 : 58 |
g) 2011 + 5[300 – (17 – 7)2] | g) 100 : 52 + 7.32 |
h) 695 – [200 + (11 – 1)2] | h) 84 : 4 + 39 : 37 + 50 |
i) 129 – 5[29 – (6 – 1)2] | i) 29 – [16 + 3.(51 – 49)] |
j) 2010 – 2000 : [486 – 2(72 – 6)] | j) 53.2 – 100 : 4 + 23.5 |
f: =20:4+5
=5+5
=10
e: =125-100=25
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1,Tính
A, 14/7 + 5/9 + 4/9 - 2
B, 31/25 + ( 15/16 - 6/15 ) + 1/16
C, 23/28 - ( 23/28 - 1/3 ) +2/3
D, 1/12 + 1/20 + 1/30 + 1/42 + 1/56 + 1/72 + 1/90
a) \(\frac{14}{7}+\frac{5}{9}+\frac{4}{9}-2\)
\(=2\frac{5}{9}+\frac{4}{9}-2\)
\(=3-2=1\)
b) \(\frac{31}{25}+\left(\frac{15}{16}-\frac{6}{15}\right)+\frac{1}{16}\)
\(=\frac{31}{25}+\frac{43}{80}+\frac{1}{16}\)
\(=1\frac{311}{400}+\frac{1}{16}\)
\(=1\frac{21}{25}\)
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Tính hợp lí ( nếu có thể ):
a) (-83) + 302 + 83
b) 14 . (-7) - 216 : 2
c) 56 . (-32) + (-68) . 56
d) 23 - 6 . [ 25 - ( 33 - 28 ) 2 ]
e) 15 . (-6) - 420 : (-4)
f) 63 . (-52) + (-48) . 63
\(a.\left(-83\right)+302+83\\ =\left(-83+83\right)+302\\ =0+302\\ =302\\ b.14.\left(-7\right)-216:2\\ =-98-108\\ =-206\\ c.56.\left(-32\right)+\left(-68\right).56\\ =56.\left[\left(-32\right)+\left(-68\right)\right]\\ =57.\left(-100\right)\\ =-5700\\ d.2^3-6.\left[25-\left(33-28\right)^2\right]\\ =8-6\left[25-5^2\right]\\ =8-6\left[25-25\right]\\ =8-6.0\\ =8-0\\ =8\\ e.15.\left(-6\right)-420:\left(-4\right)\\ =-90-\left(-105\right)\\ =-90+105\\ =15\)
\(f.63.\left(-52\right)+\left(-48\right).63\\ =63.\left[\left(-52\right)+\left(-48\right)\right]\\ =63.\left(-100\right)\\ =-6300\)
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a)5. ( x + 35 ) = 515
b) (x+7):3=14c) 72:(x–15)=8
d) 19+(x+23)=50
e) (18–x) + 23 =29
f) 56–(x+14)=22g) (2x +1)–7=14
h) 3. (x+1)–32=67i) 70–5. (x–3)=45
j) 200–8. (2x+7)=112
k) 123–(x+4). 5 =38
\(a,\Rightarrow x+35=103\\ \Rightarrow x=68\\ b,\Rightarrow x+7=42\\ \Rightarrow x=35\\ c,\Rightarrow x-15=9\\ \Rightarrow x=24\\ d,\Rightarrow x+23=31\\ \Rightarrow x=8\\ e,\Rightarrow18-x=6\\ \Rightarrow x=12\\ f,\Rightarrow x+14=34\\ \Rightarrow x=20\\ g,\Rightarrow2x+1=21\\ \Rightarrow x=11\\ h,\Rightarrow3\left(x+1\right)=99\\ \Rightarrow x+1=33\Rightarrow x=32\\ i,5\left(x-3\right)=25\\ \Rightarrow x-3=5\\ \Rightarrow x=8\\ j,\Rightarrow8\left(2x+7\right)=88\\ \Rightarrow2x+7=11\Rightarrow x=2\\ k,\Rightarrow5\left(x+4\right)=85\\ \Rightarrow x+4=17\\ \Rightarrow x=13\)
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a. (+18) + (+2) b. (-3) + 13 c. (-12) + (-21) d. (-30) + (-23)
e. -52 + 102 f. 88 + (-23) g. 13 + |-13| h. -43 – 26
k. (-89) – 9 l. 28 + 42 m. (-56) + |-32| n. 40 – |-14|
o. |-4| + |+15| p. |30| – |-17|
a. (+18) + (+2)= 20
b. (-3)+13= 11
c. (-12)+(-21)=-33
d. (-30)+(-23)=-53
e. -52+102=50
f. 88+(-23)=65
g. 13+|-13|=26
h. -43-26=-69
k. (-89)-9=-98
m. -56+|-32|=-24
n. 40 -|-14|=26
o. |-4|+|+15|=19
p. |30|-|-17|=13
