Standard Form
Arithmetic in Standard Form
Significant Figures
Upper & Lower Bounds
Mantissa a (1 ≤ a < 10)
4.703
Exponent n
5
First mantissa
3.0
First exponent
8
Operation
multiply
divide
add
subtract
Second mantissa
4.0
Second exponent
6
Number
30748
Size
whole number
÷ 100
÷ 10 000
Round to
1
2
3
4
Measurement x
24
x measured to the nearest
10
1
0.1
0.01
Measurement y
6
y measured to the nearest
10
1
0.1
0.01
Calculate
x + y
x − y
x × y
x ÷ y
each measurement is an interval, and so is the answer
x
y
the answer
the value you were told
How to think about it
Common mistakes