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Basic Math Examples
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Basic Math
Estimate 100-210
100
−
210
100
-
210
Step 1
Round
100
100
to
100
100
.
100
−
210
100
-
210
Step 2
Round
−
210
-
210
to
−
200
-
200
.
100
−
200
100
-
200
Step 3
Subtract
200
200
from
100
100
.
−
100
-
100
Step 4
The
approximate
value of
100
−
210
100
-
210
found by front end estimation.
100
−
210
≈
−
100
100
-
210
≈
-
100
1
0
0
−
2
1
0
1
0
0
-
2
1
0
(
(
)
)
|
|
[
[
]
]
√
√
≥
≥
π
π
7
7
8
8
9
9
≤
≤
4
4
5
5
6
6
/
/
^
^
×
×
>
>
!
!
1
1
2
2
3
3
-
-
+
+
÷
÷
<
<
,
,
0
0
.
.
%
%
=
=
⎡
⎢
⎣
x
2
1
2
√
π
∫
x
d
x
⎤
⎥
⎦
[
x
2
1
2
π
∫
x
d
x
]
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