Let’s solve each problem step by step.
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Top Left Section: Multiplying by 10, 100, 1000
Rule: Move decimal to the right. Number of zeros = number of places you move.
a) 43 × 10 → move decimal 1 place right →
430
b) 789 × 100 → move decimal 2 places right →
78,900
c) 3.5 × 100 → move decimal 2 places right →
350
d) 58.3 × 10 → move decimal 1 place right →
583
e) 0.324 × 1000 → move decimal 3 places right →
324
f) 2.098 × 100 → move decimal 2 places right →
209.8
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Top Right Section: Dividing by 10, 100, 1000
Rule: Move decimal to the left. Number of zeros = number of places you move.
a) 39 ÷ 10 → move decimal 1 place left →
3.9
b) 410 ÷ 100 → move decimal 2 places left →
4.10 or 4.1
c) 654 ÷ 1000 → move decimal 3 places left →
0.654
d) 8.3 ÷ 10 → move decimal 1 place left →
0.83
e) 342.5 ÷ 100 → move decimal 2 places left →
3.425
f) 0.23 ÷ 100 → move decimal 2 places left →
0.0023
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Bottom Left Section: Fill in the blank (multiplication/division)
We need to find what number makes the equation true.
a) 73 × ___ = 7300 → 7300 ÷ 73 =
100
b) 873 ÷ ___ = 87.3 → 873 ÷ 87.3 =
10
c) 0.802 × 100 = ___ → move decimal 2 places right →
80.2
d) ___ ÷ 1000 = 42.09 → multiply 42.09 × 1000 →
42090
e) 9.231 × ___ = 923.1 → 923.1 ÷ 9.231 =
100
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Bottom Right Section: Fill in the blank (multiplication/division)
f) 98.02 × ___ = 98020 → 98020 ÷ 98.02 =
1000
g) 9.002 ÷ ___ = 0.09002 → 9.002 ÷ 0.09002 =
100
h) 2.0901 × ___ = 2090.1 → 2090.1 ÷ 2.0901 =
1000
i) 0.124 ÷ ___ = 0.00124 → 0.124 ÷ 0.00124 =
100
j) 18.9802 ÷ ___ = 1.89802 → 18.9802 ÷ 1.89802 =
10
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Final Answer:
Top Left:
a) 430
b) 78,900
c) 350
d) 583
e) 324
f) 209.8
Top Right:
a) 3.9
b) 4.1
c) 0.654
d) 0.83
e) 3.425
f) 0.0023
Bottom Left:
a) 100
b) 10
c) 80.2
d) 42090
e) 100
Bottom Right:
f) 1000
g) 100
h) 1000
i) 100
j) 10
Parent Tip: Review the logic above to help your child master the concept of dividing decimals by 10 100 and 1000 worksheet.
