Tính:
3 , 56 % + 8 , 77 % = 99 % : 3 = 86 % + 7 % = 45 % × 4 =
cau hoi de:
77+74-45+86-89+44+55+77=?
77*88*99/44*77/77/7/5=?
Tính:
3 , 56 % + 8 , 77 % =
99 % : 3 =
86 % + 7 % =
45 % × 4 =
3 , 56 % + 8 , 77 % = 12 , 33 %
86 % + 7 % = 93 %
99 % : 3 = 33 %
45 % × 4 = 180 %
Tính
a,21. 35 - 3 . 26 . 7
b, 77 - 11 . ( 30 + 7)
c, 85. ( 36 - 27 ) - 35 . ( 86 - 27 )
d, 47 . ( 43 - 15 ) - 47 . ( 45 + 15)
a,21.35-3.26.7
=735-546
=189
b,77-11.(30+7)
=77-407
=-330
c,85.(36-27)-35.(86-27)
=85.9-35.59
=765-2065
=1300
d,47.(43-15)-47.(45+15)
=47.28-47.60
=47.(28-60)
=47.(-32)=-1504
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 * 55 * 56 * 57 * 58 * 59 * 60 * 61 * 62 * 63 * 64 * 65 * 66 * 67 * 68 * 69 * 70 * 71 * 72 * 73 * 74 * 75 * 76 * 77 * 78 * 79 * 80 * 81 * 82 * 83 * 84 * 85 * 86 * 87 * 88 * 89 * 90 * 91 * 92 * 93 * 94 * 95 * 96 * 97 * 98 * 99 * 100 bằng bao nhiêu?
86-84+82-80+...+8-6+4-2
77-75+73-71+...+7-5+3-1
Tính nhanh
86-84+82-80+...+8-6+4-2
=2+2+2+...+2+2+2 (có tất cả 21 số 2)
=2.21
=42
77-75+73-71+...+7-5+3-1
= 2 + 2 + ... + 2 ( có 38 số 2)
= 2 . 38
= 76
tick đúng cho mình nhé !
>,<,=
3/5...1/2 5/6...7/8 8/9...7/6
9/4..7/3 8/12...2/3 77/99...7/9
50/75 ... 10/15
a: 3/5>1/2
b: 5/6<7/8
c: 8/9<7/6
d: 9/4<7/3
e: 8/12=2/3
f: 77/99=7/9
\(\dfrac{3}{5}>\dfrac{1}{2}\)
\(\dfrac{5}{6}< \dfrac{7}{8}\)
\(\dfrac{8}{9}< \dfrac{7}{6}\)
\(\dfrac{9}{4}< \dfrac{7}{3}\)
\(\dfrac{8}{12}=\dfrac{2}{3}\)
\(\dfrac{77}{99}=\dfrac{7}{9}\)
\(\dfrac{3}{5}>\dfrac{1}{2}\)
\(\dfrac{5}{6}< \dfrac{7}{8}\)
\(\dfrac{8}{9}< \dfrac{7}{6}\)
\(\dfrac{9}{4}< \dfrac{7}{3}\)
\(\dfrac{8}{12}=\dfrac{2}{3}\)
\(\dfrac{77}{99}=\dfrac{7}{9}\)
Tính nhanh :
2, 5 * 8, 7 + 7, 5 * 8, 7 = ?
86 * 5 + 86 * 4 + 86 = ?
123,45 + 23,56 + 76,44 + 54,55 = ?
456 x 45 + 456 x 10 – 456 x 55 = ?
25 x 8 x 17 x 50 = ?
(12 x 2 + 12 x 4 – 12 x 6) : (2 + 4 +…….+12 + 14) = ?
(1+3+5+7+9+11+13+15) : (32 x 2) = ?
(24 x 6 + 4 x 24) : (49 – 24 x 2) = ?
(1+2+3+…..+98+99+100) : 5050 = ?
35 x 11 x 0,1 x 0,25 x 100 x (3 : 0,4 – 7,5) = ?
ai giải nhanh và đúng nhất m k cho, trình bày ra nhé
123,45 + 23,56 +76,44 + 54,55
= (123,45 + 54,55) + (23,56 + 76,44)
= 178 + 100
= 278
456 x 45 + 456 x 10 + - 456 x 55
=456 x (45 +10-55)
=456 x 0
=0
2,5 x 8,5 + 7,5 x 8,5
=8,5 x (2,5 +7,5)
= 8,5 x 10
= 85
86 x 5 + 86 x 4 + 86
= 86 x (5+4+1)
= 86 x10
860
25 x 8 x 17 x 50
= 50 x 4 x 17 x 50
= 200 x 17 x 50
= 200 x 50 x 17
= 10000 x 17
= 170000
(12 x 2 + 12 x 4 - 12 x 6 ) : ( 2 + 4 + 6 +... + 12 +14)
=(12 x (2 + 4 - 6) ) : ( 2 + 4 + 6 + ... + 12 + 14 )
= (12 x 0 ) : (2 + 4 + 6 + ... + 12 + 14 )
=0 : ( 2 + 4 + 6 + ... + 12 + 14)
= 0
Tính nhẩm:
6 ´ 8= .......... |
28 : 4 = .......... |
35 : 5 = ……. |
7 ´ 9 = .......... |
56 : 7 = .......... |
4 ´ 6 = .......... |
5 ´ 4 = .......... |
42 : 6 = .......... |
36 : 6 = ……. |
3 ´ 8 = ……. |
45: 5 = …… |
49 :7 = …….. |
6 ´ 8= 48 |
28 : 4 = 7 |
35 : 5 = 7 |
7 ´ 9 = 63 |
56 : 7 = 8 |
4 ´ 6 = 24 |
5 ´ 4 = 20 |
42 : 6 = 7 |
36 : 6 = 6 |
3 ´ 8 = 24 |
45: 5 = 9 |
49 :7 = 7 |
Tính nhẩm
9 x 5 =
63 : 7 =
8 x 8 =
5 x 7 =
8 x 7 =
3 x 8 =
40 : 5 =
5 x 5 =
7 x 5 =
7 x 8 =
6 x 4 =
45 : 9 =
7 x 7 =
35 : 5 =
56 : 8 =
2 x 8 =
81 : 9 =
9 x 9 =
35 : 7 =
56 : 7 =
9 x 5 = 45
63 : 7 = 9
8 x 8 = 64
5 x 7 = 35
8 x 7 =56
3 x 8 = 24
40 : 5 = 8
5 x 5 = 25
7 x 5 = 35
7 x 8 =56
6 x 4 = 24
45 : 9 = 5
7 x 7 = 49
35 : 5 = 7
56 : 8 = 7
2 x 8 = 16
81 : 9 = 9
9 x 9 = 81
35 : 7 = 5
56 : 7 = 8
ay bạn ơi dễ vậy mà