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Lesson # 14. Sliding Decimal Points. When we divide a number by 10…. The decimal point slides One place To the Left Watch…. 123 ÷ 10 = ?. 12.3 Right!. So when dividing by 100…. The decimal point Slides Two places To the Left Watch…. 123 ÷ 100 =. 1.23. Similar rules apply.
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Lesson # 14 Sliding Decimal Points
When we divide a number by 10… The decimal point slides One place To the Left Watch…
123 ÷ 10 = ? 12.3 Right!
So when dividing by 100… The decimal point Slides Two places To the Left Watch…
123 ÷ 100 = 1.23
Similar rules apply When Multiplying By 10 Or 100
The only difference… The decimal point Slides In The Opposite (right) Direction Watch…
123 x 10 = ? 1230
123 x 100 = ? 12 300
Got it ? I hope so, Because Here come 10 Practice questions…
Ready? Set… Go !
Question # 1 324 ÷ 10 = ?
Question # 2 56 x 100 = ?
Question # 3 78.9 x 10 = ?
Question # 4 12.34 ÷ 10 = ?
Question # 5 3.456 X 100 = ?
Question # 6 7.89 ÷ 10 = ?
Question # 7 912.3 X 100 = ?
Question # 8 0.456 ÷ 10 = ?
Question # 9 0.78 ÷ 100 = ?
Question # 10 0.925 x 100 = ?
And now for the answers… Get Ready
Question # 1 324 ÷ 10 = 32.4
Question # 2 56 x 100 = 5600
Question # 3 78.9 x 10 = 789
Question # 4 12.34 ÷ 10 = 1.234
Question # 5 3.456 X 100 = 345.6
Question # 6 7.89 ÷ 10 = 0.789
Question # 7 912.3 X 100 = 91 230
Question # 8 0.456 ÷ 10 = 0.0456
Question # 9 0.78 ÷ 100 = 0.0078
Question # 10 0.925 X 100 = 92.5
The End
Of course… Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice Practice