Transcript
![Page 1: Calcul mental multiplications et divisions par 10 100 1 000](https://reader035.vdocuments.net/reader035/viewer/2022062723/56813f35550346895da9d9eb/html5/thumbnails/1.jpg)
Calcul mental
multiplications et divisions par 10 100 1 000 ...
multiplications par 0,1 0,01 0,001 ...
![Page 2: Calcul mental multiplications et divisions par 10 100 1 000](https://reader035.vdocuments.net/reader035/viewer/2022062723/56813f35550346895da9d9eb/html5/thumbnails/2.jpg)
3,405 x 100 =
1)
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14,78 x ... = 1 478
2)
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14,78 x 1 000 =
3)
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12,543 x ... = 125,43
4)
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3,405 x 10 =
5)
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14,78 x ... = 147 800
6)
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3,405 x 1 000 =
7)
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12,543 x ... = 125 430
8)
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850,3 ÷ 100 =
9)
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3 080 ÷ ... = 308
10)
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850,3 ÷ ... = 0,850 3
11)
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3 080 ÷ 100 =
12)
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4 090 ÷ ... = 0,409
13)
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38 x 0,1 =
14)
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57 x ... = 0,57
15)
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3,87 x 0,01 =
16)
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50 700 x 0,0 001 =
17)
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30 600 x ... = 0,306
18)
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... x 0,01 = 0,040 5
19)
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100 x ... = 4 352,7
20)