Mental Arithmetic
Level
1
2
3
3/10
About
how much is this?
$31 + $41 + $28
≈
$
100
\approx \$100
≈
$100
≈
$
130
\approx \$130
≈
$130
≈
$
110
\approx \$110
≈
$110
≈
$
120
\approx \$120
≈
$120
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