tính :
136 . ( 668 - 588 ) - 404 . 25
A) 7080 - ( 1000 - 536)
B) 5347 + ( 2376 - 734)
C) 2806 - ( 1134 + 950 ) - 280
D) 136. ( 668 - 588 ) - 404. 25
E) 1953 + ( 17432 - 56 . 223 ) : 16
G) 6010 - ( 130 . 52 - 68890 : 83)
a) 7080-(1000-536) = 6616
b) 5347+(2376-734)= 6989
c) 2806-(1134+950)-280=442
d) 136.(668-588)-404.25= 780
e) 1953+(17432-56.223):16=2262
g) 6010-(130.52-68890:83) = 80
2. Tính giá trị biểu thức
c) 1054+987-1108
b) 8376-2453-699
3. Tính:
b) 5347+(2376-734)
d) 136.(668-588)-404.25
g) 6010-(130.52-68 890:83)
c) 1054+987-1108
=2041-1108
=933
b) 8376-2453-699
=5923-699
=5224
b) 5347+(2376-734)
=5347+1642
=6989
d) 136.(668-588)-404.25
=136.80-404.25
=10880-10100
=780
g) 6010-(130.52-68890:83)
=6010-(6760-830)
=6010-5930
=80
3. Tính
a. 136 × ( 668 - 588 ) - 404 × 25
b. 6010 - ( 130 × 52 - 68 890 ÷ 83 )
4. Tính nhanh
aa) 1234 × 2014 + 2014 × 8766
bb. 1357 × 2468 × 357
cc. ( 14 678 ÷ 2 + 2476 )× ( 2576 - 2575 )
dd. ( 195 - 13 × 15 )÷ ( 1945 + 1014 )
Giúng mk với.
\(a,136\times\left(668-588\right)-404\times25\)
\(=136\times80-10100\)
\(=10880-10100\)
\(=780\)
\(b,6010-\left(130\times52-68890:83\right)\)
\(=6010-\left(6760-830\right)\)
\(=6010-5930=80\)
1. Đặt tính rồi tính:
30 452 - 2236
25x64
537x46
375:15
578:18
2.tính giá trị biểu thức
a)5500-375+1182
b)8376-2453-699
c) 1054+987-1108
d) 1540:11+1890:9982
3. tính
a) 7080-(1000-586)
b)5347+(2376-734)
c) 2806-(1134+950)-280
d) 136.(668-588) - 404.25
e) 1953+(17432-56.223):16
g) 6010-(130.52-68890:83)
1.Tính nhanh nếu có thể:
1) (+15)+(+17)
2) (-3)+(-7)
3) (-25)+(+4)
4) (-6)+(-54)
5) (-15)+20
6)(-5)+8+7+5
7) (-8)+(-11)+(-2)
8) 15+(-5)+(-14)+(-16)
9) (-20)+(-14)+3+(-86)
10)(-136)+123+(-264)+(-83)+240
11) (-596)+2001+1999+(-404+189)
12, ( 314 + ( -153) +64 +121+(-247)+218
1) \(\left(+15\right)+\left(+17\right)=15+17=32\)
2) \(\left(-3\right)+\left(-7\right)=-3-7=-\left(3+7\right)=-10\)
3) \(\left(-25\right)+\left(+4\right)=-25+4=-\left(25-4\right)=-21\)
4) \(\left(-6\right)+\left(-54\right)=-6-54=-\left(6+54\right)=-60\)
5) \(\left(-15\right)+20=20-15=5\)
6) \(\left(-5\right)+8+7+5\)
\(=\left(-5+5\right)+\left(8+7\right)\)
\(=15\)
7) \(\left(-8\right)+\left(-11\right)+\left(-2\right)\)
\(=\left[\left(-8\right)+\left(-2\right)\right]+\left(-11\right)\)
\(=\left(-10\right)+\left(-11\right)\)
\(=-21\)
8) \(15+\left(-5\right)+\left(-14\right)+\left(-16\right)\)
\(=\left[15+\left(-5\right)\right]+\left[\left(-14\right)+\left(-16\right)\right]\)
\(=10+\left(-30\right)\)
\(=-20\)
9) \(\left(-20\right)+\left(-14\right)+3+\left(-86\right)\)
\(=\left[\left(-20\right)+3\right]+\left[\left(-14\right)+\left(-86\right)\right]\)
\(=\left(-17\right)+\left(-100\right)\)
\(=-117\)
10) \(\left(-136\right)+123+\left(-264\right)+\left(-83\right)+240\)
\(=\left[\left(-136\right)+\left(-264\right)\right]+\left[123+\left(-83\right)\right]+240\)
\(=\left(-400\right)+40+240\)
\(=\left(-360\right)+240\)
\(=-120\)
11) \(\left(-596\right)+2001+1999+\left(-404+189\right)\)
\(=\left(-596\right)+2001+1999-404+189\)
\(=\left[\left(-596\right)-404\right]+\left(2001+189\right)+1999\)
\(=\left(-1000\right)+2190+1999\)
\(=1190+1999\)
\(=3189\)
12) \(314+\left(-153\right)+64+121+\left(-247\right)+218\)
\(=\left(314+64+121\right)+\left[\left(-153\right)+\left(-247\right)\right]+218\)
\(=\left(378+121\right)+\left(-400\right)+218\)
\(=499-400+218\)
\(=99+218\)
\(=317\)
\(\text{#}Toru\)
tính = 1 cách hợp lí
a,-136+123+(-264)+(-83)+240
b,-596+2001+1999+(-404)+189
làm ơn mình đg cần gấp!
a,-136+123+(-264)+(-83)+240
= (123 - 83) - (136 + 264) + 240
= -40 - 400 + 240
= (240 - 40) - 400
= 200 - 400 = -200
b,-596+2001+1999+(-404)+189
= (2001 + 1999) - (596 + 404) + 189
= 4000 - 1000 + 189
= 3000 + 189
= 3189
3.Tính
a) 7080-(100-536)
b) 5347+(2376-734)
c)2806-(1134+950)-280
d) 136.(669-588)-404.25
g)6010-(139.52-68890:83)
( . = nhân)
a)
3. Tính
A) 7080 - ( 1000 - 536 )
B) 5347 + ( 2376 - 734 )
C) 2806 - ( 1134 + 950 ) - 280
D) 136 × ( 668 - 588 ) - 404 × 25
E) 1953 + ( 17 432 - 56 × 223 ) ÷ 16
G) 6010 - ( 130 × 52 - 68 890 ÷ 83 )
4. Tính nhanh
a) 1234 × 2014 + 2014 × 8766
b) 1357 × 2468 - 2468 × 357
c) ( 14 678 ÷ 2 + 2476 ) × ( 2576 - 2575 )
d) ( 195 - 13 × 15 ) ÷ ( 1945 + 1014 )
5. Tìm x , biết
a. 456 + ( x - 357 ) = 1362
b. ( 2345 - x ) - 183 = 2014
c. ( x - 2005 ) × 2006 = 0
d. 480 + 45 × 4 = ( x + 125 )÷ 5 + 206
e. 2005 × ( x - 2006 ) = 2005
g. [ ( x + 50 ) × 50 - 50 ] ÷ 50 = 50
Giúp mk với
ghi nhìu z ai trả lời nổi
nếu ai thấy mk nói đúng
thì nhớ k nha
thanks nhìu
Bài 5: Tính bằng cách thuận tiện nhất:
A = 404 x 25 + 75 x 404/2038 - 9 - 9
\(A=\dfrac{404\times25+75\times404}{2038-9-9}\)
\(=\dfrac{404\times\left(25+75\right)}{2029-9}\)
\(=\dfrac{404\times100}{2020}\)
\(=\dfrac{40400}{2020}\)
\(=20\)
#\(Toru\)