Thực hiện phép tính:
A =\(\frac{5.\left(2^2.3^2\right)^9.\left(2^2\right)^6-2.\left(2^2.3\right)^{14}.3^4}{5.2^{28}.3^{18}-7.2^{29}.3^{18}}\)
B= \(81.\frac{12-\frac{12}{7}-\frac{12}{289}-\frac{12}{85}5+\frac{5}{13}+\frac{5}{169}+\frac{5}{91}}{4-\frac{4}{7}-\frac{4}{289}-\frac{4}{85}6+\frac{6}{13}+\frac{6}{169}+\frac{6}{91}}.\frac{158158158}{711711711}\)
Tính nhanh
24. (16-5) -16.( 24-5 )
29 ( 9-13 ) -19 ( 29-13)
31 ,(-18) + 31 .(-81) - 31
-12 . 47 + (-12) .52 + (-12)
(-6 - 2 ) .(-6 + 2)
(-5 + 9 ) .(-4)
13-12+11+10-9+8-7-6+5-4+3+2-1
Tìm x
6-2(x+4)=-4
6 chia hết x
2x-15:5=-7
231-(x-6)=1339:13
(x-12):6=3 - x^2-1=3
28-x^3=1
(x+2)^3=27
81-(x-5)^2=56
x^2=9
14 chia hết x +3
thực hiện phép tính một cách gọn nhất
a, 12 mũ 7 :6 mũ 7
b,27 mũ 5 : 81 mũ 3
c,18 mũ 3 : 9 mũ 3
d, 125 mũ 3 : 25 mũ 4
Thực hiện phép tính:
a. A=\(\dfrac{5^2.6^{11}.16^2+6^2.12^6.15^2}{2.6^{12}.10^4-81^2.960^3}\)
b. B=\(\dfrac{4^6.9^5+6^9.120}{8^4.3^{12}-6^{11}}\)
-3+7+(-6)=
-4+(-3)+5=
-5+(-9)+8+(-3)=
7+(-8)+9+(-10)=
-5+12+(-4)=
|-14|+|-13|+(-17)+(-19)=
lam co tick
Tìm x : |x|-38/7*|x|-3/4=2|x|+(-8/7)
x*13/4+(-7/6)*x-5/3=5/12
93/17:x+(-4/17):x+22/7:52/3=4/11
Mình sẽ mở một cuộc thi Toán 6 bạn nào muốn tham gia thì giải bài dưới đây nếu đạt mình sẽ mở vòng 2 ^^
ĐỀ CƯƠNG ÔN TẬP TOÁN 6
Bài 1 : Thực hiện phép tính :
a. 17.85 + 15.17 - 120 b.5.72 - 24:23 c. 33. 22 - 27.19 d. -|-3| + ( - 23 ) e. -|-13| + |-25 | + | 12 |
f. 23 - ( 12 - 42 ) g. 80 - [ 130 - ( 12 - 4 )2 ] h. 24.5 [ 131 - ( 13 - 22 ]2 ] i. - ( -23 ) + | - 13 | - | - 42 |
k. ( 315.4 + 5.315 ) : 316 l. 1125 : 32 + 43.125 - 125 : 52 m. |-18 | : | -6 | - ( -12 ) + ( -20 )
BÀI LÀM
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