10 100 1000 Flashcards

Multiply and vidive numbers by powers of ten

1
Q

Calculate:

a) 0.8 · 100 =
b) 142 : 1000 =
c) 10 · 0.0015 · 10 =

A

a) 0.8 · 100 = 80
b) 142 : 1000 = 0.142
c) 10 · 0.0015 · 10 = 0.15

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2
Q

Calculate

a) 0.1 · 0.2 =
b) 60 · 0.01 =
c) 400 : 0.1 =

A

a) 0.1 · 0.2 = 0.02
b) 60 · 0.01 = 0.6
c) 400 : 0.1 = 4000

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3
Q

Find the missing number

a) 100 · p = 10’000 p=?
b) 34 : e = 0.034 e=?
c) n · 0.456 = 45.6 n=?

A

a) 100 · p = 10’000 p = 100
b) 34 : e = 0.034 e = 1000
c) n · 0.456 = 45.6 n=100

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4
Q

Complete the sentence

When dividing by 100, the comma (or the decimal point) moves to the ______ by ___ positions

A

When dividing by 100, the comma (or the decimal point) moves to the LEFT by 2 positions

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5
Q

Complete this sentence

When multiplying by 1000, the comma (or the decimal point) moves to the _____ by ___ positions

A

When multiplying by 1000, the comma (or the decimal point) moves to the RIGHT by 3 positions

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6
Q

Complete this sentence

When multiplying by 0.1, the comma (or the decimal point) moves to the _____ by ___ positions

A

When multiplying by 0.1, the comma (or the decimal point) moves to the LEFT by 1 position

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7
Q

Complete this sentence

When dividing by 0.01, the comma (or the decimal point) moves to the _____ by ___ positions

A

When dividing by 0.01, the comma (or the decimal point) moves to the RIGHT by 2 positions

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8
Q

Find the missing number

x · x = 10’000

A

x = 100

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9
Q

Find the missing number

0.001 : x = 1

A

x = 0.001

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10
Q

Suppose that the numebr a is not zero and calculate if possible the value of this expression:

a · a : a = ?

A

The result must be equal to a:

a · a : a = a

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