340-(200+40)
150:(20+5)
thuc hien phep tinh nha
Thuc hien phep tinh :
a, 126 + (-20) + |124| -(-320) - |-150|
126+(-20)+l124I-(-320)-l-150l
=126-20+124+320-150
=106+124+320-150
=230+320-150
=550-150
=400.
k nha nếu đúng...
126+(-20)+|124|-(-320)-|150|=126+(-20)+124-(-320)-150
=106+124-(-320)-150
=230-(-320)-150
=550-150
=400
k nhé ......................
thuc hien phep tinh:
\(\sqrt{3}.\sqrt{\frac{1}{27}}.\sqrt{5}.\sqrt{20}\)
\(\sqrt{3}.\sqrt{\frac{1}{27}}.\sqrt{5}.\sqrt{20}=\sqrt{3.\frac{1}{27}}.\sqrt{5.20}=\sqrt{\frac{1}{9}}.\sqrt{100}=\frac{1}{3}.10=\frac{10}{3}\)
Bai 1 : Thuc hien phep tinh :
a ) 5 ^ 20 : ( 5^15 . 6 + 5^15 . 19 )
Minh can gap ,ai nhanh minh se tick cho nha .
thuc hien phep tinh :
53 . 18 + 2 . 9 . 87 - 18 . 40
Ai nhanh mình tick nha . Đang cần lắm
53 . 18 + 2 . 9 . 87 - 18 . 40
= 53 . 18 + 18 . 87 - 18 . 40
= 18 ( 53 + 87 - 40 )
= 18 . 100
= 1800
53 . 18 + 2 . 9 . 87 - 18 . 40
=53 . 18 + 18 . 87 - 18 . 40
=18 . (53 +87 - 40)
=18 . 100
=1800
Thuc hien phep tinh ( nhanh neo co the )
3 × 52 - 64 ÷ 23
17 × 81 + 19 × 17 + 210
78 ÷ { 390 ÷ [ 410 - ( 340 + 15 × 4 ) ] }
\(3.5^2-64:2^3\)
\(\Leftrightarrow75-8\)
\(\Rightarrow67\)
\(17.81+19.17+210\)
\(\Leftrightarrow17.\left(81+19\right)+210\)
\(\Leftrightarrow17.100+210\)
\(\Leftrightarrow1700+210\)
\(\Leftrightarrow1910\)
1,thuc hien phep tinh hop li
a,187+[923-(923+887)]
B, 39.187+30^2-78.39
giup minh giai nhung thuc hien phe tinh nha
a)187 + [923 - (923 + 887)]
= 187 + [923 - 923 - 887]
= 187 + 923 - 923 - 887
= 187 + 0 - 887
= 187 - 887
= -700
b)39 . 187 + 302 - 78 . 39
= 39 . 187 + 900 - 78 . 39
= 39 . (187 - 78) + 900
= 39 . 109 + 900
= 4251 + 900
= 5151
a, 187+[923-(923+887)]
=187+[923-923-887]
=187-887
=-700
b, 39.187+302-78.39
=39.(187-78)+900
=39.109+900
=4251+900
=5151
Câu b bạn xem lại đầu bài là 78 hay 87 nha. Là 87 sẽ đúng hơn đó.
thuc hien phep tinh
( 5*4^15*9-4*3^20*8^9) /( 5*2^9*6^19-7*2^29*27^6)
Tách hai dấu ngoặc thành hai vế A và B
Ta có :
A=5.415.99-4.320.89=5.230.318-22.227.320
=229.318(2.5-32)=229.318
B=5.29.619-7.229.276=5.29.219.319-7.229.318
=228.318(5.3-7.2)=228.318
=>A:B=229.318:228:318=2
thuc hien phep tinh (tinh nhanh neu co the)
a. 40{[ 11+(26-3^2)]/2}
thuc hien phep tinh
73 . 35 + 27 . 19 - 20 . 73 + 81 . 27 + 85 . 73
73 . 35 + 27 . 19 - 20 . 73 + 81 . 27 + 85 . 73
= 73 . ( 35 - 20 + 85 ) + 27. ( 19 + 81 )
= 73 . 100 + 27. 100
= ( 73 + 27 ) . 100
= 100 . 100
= 10 000
73. 35+ 27.19- 20. 73+ 81. 27+ 85. 73
= 73.(35+ 85 - 20) + 27.(19+81)
=73.100 +27.100
=100.(27+73)
=100.100
=10000
Tick mìn nha