1 + 1 =
5 x 3 =
7 x 4 =
65 + 45 =
9 x 54 =
1. Tính :
a) 23 + 24 - ( 65 x 2 - 4 ) x 4 + 66 + 44 - ( 54 : 9 x 9 : 9 + 45 ) : 1 + 1 - 1 x ( 23 + 23 - 23 x 2 +1 ) = ???
b) 4444444444444444444444444444444444444444444444444444444444444444444 : 1 = ???
c ) 3^0 = ???
d)1/1 = ???
e ) Em hãy tả em =)).
1. Tính:
a) 23 + 24 - ( 65 x 2 - 4 ) x 4 + 66 + 44 - ( 54 : 9 x 9 : 9 + 45 ) : 1 + 1 - 1 x ( 23 + 23 - 23 x 2 +1 ) = 51
b) 4444444444444444444444444444444444444444444444444444444444444444444 : 1
= 4444444444444444444444444444444444444444444444444444444444444444444
c) 30 = 0
d) 1/1 = 1
e)
a) - 530
b) 44444444444444444444444444444444444444444444444444444444444444444444
c) 0
d) 1
e) Em là em
-530
444444444444444444444444444444444444444444444444444444444444444
0
1
...
1:tính bằng cách thuận tiện nhất:
a)54 x 113 + 45 x 113 + 113 b)3/7 + 4/9 + 8/14 + 10/18
2:tính giá trị biểu thức
a)9/5 - 1/2 + 1/3
b)12/9 x 1/12 + 1/6 x 12/9
c)3/4 x (5/6 + 2/3)
d)3/2 - 2/3 : 2
1.a,=(54+45+1).113
=100.113
=11300
b,=(3/7+8/14)+(4/9+10/18)
=1+1
=2
2.a,=13/10+1/3
=49/30
b,=12/9.(1/12+1/6)
=12/9.1/4
=1/3
c,=3/4.3/2
=9/8
d,=3/2-1/3
=7/6
1:tính bằng cách thuận tiện nhất:
a)54 x 113 + 45 x 113 + 113
= 54 x 113 + 45 x 113 + 113x1
=113 x(54+45+1)
= 113x100
=1300
b)3/7 + 4/9 + 8/14 + 10/18
=(3/7+8/14)+(4/9+10/18)
= 1 + 1
=2
tính nhanh : a, 9 x 12 x25 b, 12 x 125 x 54 c, 8 x 9 x 14 + 6 x 7 x 12 + 19 x 4 x 18 d, 425 x 7 x 4 - 170 x 60 e, 1 + 5 + 9 + 13 + ... + 57 + 61 + 65
a,9.3.4.25
= 27.100
= 2700
b, 12.125.54
= 3.4.125.54
= 125.4.3.54
= 500.162
= 81000
c: \(=72\cdot14+72\cdot7+72\cdot19=72\cdot40=2880\)
d: \(=1700\cdot7-1700\cdot6=1700\)
e: Số số hạng là (65-1)/4+1=17(số)
Tổng là: \(\dfrac{65+1}{2}\cdot17=33\cdot17=561\)
1 x 9 = 9
2 x 9 = 18
3 x 9 = 27
4 x 9 = 36
5 x 9 = 45
6 x 9 = 54
7 x 9 = 63
8 x 9 =72
9 x 9 = 81
10 x 9 = 90
Câu hỏi là : 9 + 18 + 27 + 36 + 45 + 54 + 63 + 72 + 81 +90 =????
9 + 18 + 27 + 36 + 45 + 54 + 63 + 72 + 90 = 414
1 x 9 = 9
2 x 9 = 18
3 x 9 = 27
4 x 9 = 36
5 x 9 = 45
6 x 9 = 54
7 x 9 = 63
8 x 9 =72
9 x 9 = 81
10 x 9 = 90
Câu hỏi là : 9 + 18 + 27 + 36 + 45 + 54 + 63 + 72 + 81 +90 =414
Tính nhẩm
9 x 6 = ...... 9 x 7 = ...... 9 x 5 = ...... 9 x 8 = ......
54 : 9 = ..... 63 : 9 = ..... 45 : 9 = ..... 72 : 9 = .....
54 : 6 = ..... 63 : 7 = ..... 45 : 5 = ..... 72 : 8 = .....
9 x 6 = 54 9 x 7 = 63 9 x 5 = 45 9 x 8 = 72
54 : 9 = 6 63 : 9 = 7 45 : 9 = 5 72 : 9 = 8
54 : 6 = 9 63 : 7 = 9 45 : 5 = 9 72 : 8 = 9
9 x 6 = 54 9 x 7 = 63 9 x 5 = 45 9 x 8 = 72
54 : 9 = 6 63 : 9 = 7 45 : 9 = 5 72 : 9 = 8
54 : 6 = 9 63 : 7 = 9 45 : 5 =9 72 : 8 =9
Tính nhẩm:
9 x 5 =
9 x 6 =
9 x 7 =
9 x 8 =
45 : 9 =
54 : 9 =
63 : 9 =
72 : 9 =
45 : 5 =
54 : 6 =
63 : 7 =
72 : 8 =
9 x 5 = 45
9 x 6 = 54
9 x 7 = 63
9 x 8 = 72
45 : 9 = 5
54 : 9 = 6
63 : 9 = 7
72 : 9 = 8
45 : 5 = 9
54 : 6 = 9
63 : 7 = 9
72 : 8 = 9
1) x+1/2=-5/3
2) 1/3-x=3/5
4) x-4/3=-7/9
5) x--7/3=5/6
6) x-1/5=9/10
7) x+5/12=3/8
8) x+5/4=7/6
9) x-2/7=1/35
10) x-2/7=-7/10
6: =>x=9/10+1/5=9/10+2/10=11/10
7: =>x=3/8-5/12=36/96-40/96=-1/24
8: =>x=7/6-5/4=14/12-15/12=-1/12
9: =>x=1/35+2/7=1/35+10/35=11/35
10: =>x=2/7-7/10=20/70-49/70=-29/70
1, \(x=-\dfrac{5}{3}-\dfrac{1}{2}=-\dfrac{10}{6}-\dfrac{3}{6}=-\dfrac{13}{6}\)
2, \(x=\dfrac{1}{3}-\dfrac{3}{5}=\dfrac{5-9}{15}=-\dfrac{4}{15}\)
4, \(x=-\dfrac{7}{9}+\dfrac{4}{3}=\dfrac{-7+12}{9}=\dfrac{5}{9}\)
5, \(x=\dfrac{5}{6}-\dfrac{7}{3}=\dfrac{5-14}{6}=-\dfrac{9}{6}=-\dfrac{3}{2}\)
6, \(x=\dfrac{9}{10}+\dfrac{1}{5}=\dfrac{9+2}{10}=\dfrac{11}{10}\)
7, \(x=\dfrac{3}{8}-\dfrac{5}{12}=\dfrac{9-10}{12}=-\dfrac{1}{12}\)
8, \(x=\dfrac{7}{6}-\dfrac{5}{4}=\dfrac{14-15}{12}=-\dfrac{1}{12}\)
9, \(x=\dfrac{1}{35}+\dfrac{2}{7}=\dfrac{1+10}{35}=\dfrac{11}{35}\)
10, \(x=-\dfrac{7}{10}+\dfrac{2}{7}=\dfrac{-49+20}{70}=\dfrac{-29}{70}\)
1) x+1/2=-5/3
2) 1/3-x=3/5
4) x-4/3=-7/9
5) x--7/3=5/6
6) x-1/5=9/10
7) x+5/12=3/8
8) 5/4=7/6
9) x-2/7=1/35
10) x-2/7=-7/10
cả phép tính nữa nha
1: =>x=-5/3-1/2=-13/6
2: =>x=1/3-3/5=-4/15
4: =>x=-7/9+4/3=-7/9+12/9=5/9
5: =>x=5/6-7/3=5/6-14/6=-9/6=-3/2
6: =>x=9/10+1/5=11/10
7: =>x=3/8-5/12=36/96-40/96=-1/24
8: Đề sai rồi bạn
Tính nhẩm
9 x 2 = ...... | 9 x 3 = ...... | 9 x 4 = ...... | 9 x 5 = ...... |
18 : 9 = ...... | 27 : 9 = ...... | 36 : 9 = ...... | 45 : 9 = ...... |
9 x 6 = ...... | 9 x 7 = ...... | 9 x 8 = ...... | 9 x 9 = ...... |
54 : 9 = ...... | 63 : 9 = ...... | 72 : 9 = ...... | 81 : 9 = ...... |
9 x 2 = 18 | 9 x 3 = 27 | 9 x 4 = 36 | 9 x 5 = 45 |
18 : 9 = 2 | 27 : 9 = 3 | 36 : 9 = 4 | 45 : 9 = 5 |
9 x 6 = 54 | 9 x 7 = 63 | 9 x 8 = 72 | 9 x 9 = 81 |
54 : 9 = 6 | 63 : 9 = 7 | 72 : 9 = 8 | 81 : 9 = 9 |
9 x 2 = 18 9 x 3 = 27 9 x 4 = 36 9 x 5 = 45
18 : 9 = 2 27 : 9 = 3 36 : 9 = 4 45 : 9 = 5
9 x 6 = 54 9 x 7 = 63 9 x 8 = 72 9 x 9 = 81
54 : 9 = 6 63 : 9 = 7 72 : 9 = 8 81 : 9 = 9