Math Worksheet: The Number System (Place Value & Rounding)
Q1. Write the value of the underlined digit:
a) 4_2,789
b) 60_,153
c) 128._75
d) 5.36_9
Q2. Write these numbers in expanded form:
a) 308,204
b) 0.57
c) 91.403
Q3. Fill in the missing digit so the number rounds to 300,000 (nearest thousand):
29_,872
Q4. Write the number one-tenth greater than 7.46 -> ______
Write the number one-hundredth less than 4.20 -> ______
Section B: Rounding Decimal Numbers
Q5. Round the following to the nearest tenth:
a) 3.78
b) 12.44
c) 5.05
d) 9.95
Q6. Round the following to the nearest hundredth:
a) 4.678
b) 2.994
c) 6.215
d) 8.801
Q7. Real-life problem:
Ali's height is 145.86 cm, and his sister's height is 139.92 cm.
a) Round both to the nearest whole number.
b) Who is taller, and by how much after rounding?
Math Worksheet: The Number System (Place Value & Rounding)
Answer Key
Section A:
Q1.
a) 40,000
b) 0
c) 0.7
d) 0.06
Q2.
a) 300,000 + 8,000 + 200 + 4
b) 0.5 + 0.07
c) 90 + 1 + 0.4 + 0.003
Q3. 9 (299,872 rounds to 300,000)
Q4.
One-tenth more than 7.46 = 7.56
One-hundredth less than 4.20 = 4.19
Section B:
Q5.
a) 3.8
b) 12.4
c) 5.1
d) 10.0
Q6.
a) 4.68
b) 2.99
c) 6.22
d) 8.80
Q7.
a) 146 cm and 140 cm
b) Ali is taller by 6 cm