Tính:
67,8 : 10 = …… | 45,26 : 100 = …… |
33,01 : 1000 = …… | 7267,03 : 10 = …… |
0,54 : 100 = …… | 5638,72 : 1000 = …… |
Tính:
67,8 : 10 = …… | 45,26 : 100 = …… |
33,01 : 1000 = …… | 7267,03 : 10 = …… |
0,54 : 100 = …… | 5638,72 : 1000 = …… |
Tính nhẩm:
a) 27 × 10 = …...; 72 × 100 =…...; 14 × 1000 =…...
86 × 10 = …...; 103 × 10 =…...; 452 × 1000 =…...
358 × 10 = …...; 1977 × 100 =…...; 300 × 1000 =…...
b) 80 : 10 = …...; 400 : 100 =…... ;6000 : 1000 =…...
300 : 10 = …...; 4000 : 100 =…... ;60000 : 1000 =…...
2000 : 10 =…...; 40000 : 100 =…... ;600000 : 1000 =…...
c) 64 × 10 =…...; 32 × 100 =…...; 95 × 1000 =…...
640 : 10 =…...; 3200 : 100 =…...; 95000 : 1000 =…...
a) 27 × 10 = 270; 72 × 100 = 7200; 14 × 1000 = 14000
86 × 10 = 860; 103 × 10 = 10300; 452 × 1000 = 452000
358 × 10 = 3580; 1977 × 100 = 197700; 300 × 1000 = 300000
b) 80 :10 = 8; 400 : 100 = 4 ;6000 : 1000 = 6
300 : 10 = 30; 4000 : 100 = 40 ; 60000 : 1000 = 60
2000 :10 = 200; 40000 :100 = 400 ;600000 : 1000 = 600
c) 64 × 10 = 640; 32 × 100 = 3200; 95 × 1000 = 95000
640 : 10 = 64; 3200 : 100 = 32; 95000 : 1000 = 95
Tính nhẩm 3,45×10 = ............
23,48 ×100 =............
9,1234 ×1000= ..........
4,067 ×10 = ............
0,238×100 =............
0,078 ×1000 = ..........
0,45 ×10 = ............
4,8 ×100 =............
9,4×1000 = ..........
Bài 9. Tính nhẩm
441,5 ×0,1 = ............
607,18×0,01 =............
522,4 ×0,001 = ..........
14,5 ×0,1 = ............
67,24 ×0,01 =............
98,01 ×0,001 = ..........
5,5 ×0,1 = ............
2,4 ×0,01 =............
1,1 ×0,001 = ..........
Tính nhẩm 3,45×10 = ............34,5
23,48 ×100 =............2348
9,1234 ×1000= ..........9123,4
4,067 ×10 = ............40,67
0,238×100 =............23,8
0,078 ×1000 = ..........78
0,45 ×10 = ............4,5
4,8 ×100 =............480
9,4×1000 = ..........9400
Bài 9. Tính nhẩm
441,5 ×0,1 = ...........44,15
607,18×0,01 =............6,0718
522,4 ×0,001 = ..........0,5224
14,5 ×0,1 = ............1,45
67,24 ×0,01 =............0,6724
98,01 ×0,001 = ..........0,09801
5,5 ×0,1 = ............0,55
2,4 ×0,01 =............0,024
1,1 ×0,001 = ..........0,0011
Tính nhẩm 3,45×10 = ...34,5.........
23,48 ×100 =.....2348.......
9,1234 ×1000= .....9123,4.....
4,067 ×10 = ....40,67........
0,238×100 =...23,8.........
0,078 ×1000 = ...78.......
0,45 ×10 = .....4,5.......
4,8 ×100 =....480........
9,4×1000 = ....9400......
Bài 9. Tính nhẩm
441,5 ×0,1 = ......44,15......
607,18×0,01 =...6,0718.........
522,4 ×0,001 = ....0,5224......
14,5 ×0,1 = ..1,45..........
67,24 ×0,01 =......0,6724......
98,01 ×0,001 = ..0,9801........
5,5 ×0,1 = ....0,55........
2,4 ×0,01 =...0,024.........
1,1 ×0,001 = ..0,0011........
Tính nhẩm 3,45×10 = ....34,5........
23,48 ×100 =.......2348.....
9,1234 ×1000= 9123,4..........
4,067 ×10 = .40,67...........
0,238×100 =.......23,8.....
0,078 ×1000 = ....78......
0,45 ×10 = .....4,5......
4,8 ×100 =....480........
9,4×1000 = ......9400....
Bài 9. Tính nhẩm
441,5 ×0,1 = ..44,15..........
607,18×0,01 =......6,0718......
522,4 ×0,001 = ...0,5224.......
14,5 ×0,1 = .....1,45.......
67,24 ×0,01 =...0,6724.........
98,01 ×0,001 = ......0,09801....
5,5 ×0,1 = ..0,55..........
2,4 ×0,01 =........0,024....
1,1 ×0,001 = ......0,0011
Tính:
a) 63 × 100 : 10
b) 960 × 1000 : 100
c) 79 × 100 : 10
d) 90000 : 1000×10
a) 63 × 100 : 10 = 6300 : 10 = 630
b)960 × 1000 : 100 = 960000 : 100 = 9600
c)79 × 100 : 10 = 7900 : 10 = 790
d)90000 : 1000 × 10 = 90 × 10 = 900
10 + 10 - 10 . 10 : 10 + 20 - 20 : ......... - 100 . 100 :100 + .......... 1000 - 1000 . 1000 : 1000 = ?
Ta có:
= 10-10.10:10
= 10 - 100 : 10
= 10 - 10
= 0
Vì các số có quá trình tương tự nên kết quả là : 10 + 0 + 0 + 0 + 0 +...+ 0 = 10
100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 nha
Tính nhẩm:
25 , 3 × 10 =
46 , 589 × 1000 =
0 , 5001 × 1000 =
8 , 04 × 100 =
1 , 07 × 10 =
68 , 031 × 100 =
25 , 3 × 10 = 253
46 , 589 × 1000 = 46589
0 , 5001 × 1000 = 500 , 1
8 , 04 × 100 = 804
1 , 07 × 10 = 10 , 7
68 , 031 × 100 = 6803 , 1
Tính nhẩm:
25 , 3 × 10 = 0 , 5001 × 1000 = 46 , 589 × 1000 = 8 , 04 × 100 = 1 , 07 × 10 = 68 , 031 × 100 =
25 , 3 × 10 = 253 0 , 5001 × 1000 = 500 , 1 46 , 589 × 1000 = 46589 8 , 04 × 100 = 804 1 , 07 × 10 = 10 , 7 68 , 031 × 100 = 6803 , 1
Tính:
10*10=
100*100=
1000*1000=
10000*10000=
100000*100000=
1000000*1000000=
10000000*10000000=
\(10\cdot10=100\)
\(100\cdot100=10000\)
Tính:
10*10=100
100*100=10000
1000*1000=1000000
10000*10000=100000000
100000*100000=10000000000
1000000*1000000=1000000000000
10000000000*10000000000=100000000000000000000
1. Tính nhẩm:
a ) 18 x 10 =
18 x 100 =
18 x 1000 =
82 x 100 =
75 x 1000 =
19 x 10 =
256 x 1000 =
302 x 10 =
400 x 100 =
b ) 9000 : 10 =
9000 : 100 =
9000 : 1000 =
6800 : 100 =
420 : 10 =
2000 : 1000 =
20020 : 10 =
200200 : 100 =
2002000 : 1000 =
a ) 18 x 10 = 180
18 x 100 = 1800
18 x 1000 = 18000
82 x 100 = 8200
75 x 1000 = 75000
19 x 10 = 190
256 x 1000 = 256000
302 x 10 = 3020
400 x 100 = 40000
b ) 9000 : 10 = 900
9000 : 100 = 90
9000 : 1000 = 9
6800 : 100 = 68
420 : 10 = 42
2000 : 1000 = 2
20020 : 10 = 2002
200200 : 100 = 2002
2002000 : 1000 = 2002
a)18 x 10 = 180
18 x 100 = 1 800
18 x 1000 = 18 000
82 x 100 = 8 200
75 x 1000 = 75 000
19 x 10 = 190
256 x 1000 = 256 000
302 x 10 = 3 020
400 x 100 = 40 000
b)9000 : 10 = 900
9000 : 100 = 90
9000 : 1000 = 9
6800 : 100 = 68
420 : 10 = 42
2000 : 1000 = 2
20 020 : 10 = 2 002
200 200 : 100 = 2 002
2 002 000 : 1000 = 2 002
a) 18*10=180 b)9000:10=900
18*100=1800 9000:100=90
18*1000=18000 9000:1000=9
82*100=8200 6800:100=68
75*1000=75000 420:10=42
19*10=190 2000:1000=2
256*1000=256000 20020:10=2002
302*10=3020 200200:100=2002
400*100=40000 2002000:1000=2002
Tính nhanh:
10 + \(\dfrac{2}{10}\) + \(\dfrac{3}{100}\) + \(\dfrac{4}{1000}\)
\(\dfrac{3}{10}\) - \(\dfrac{5}{100}\) + \(\dfrac{7}{1000}\)
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