Accuracy Score
0 / 0
Streak
0
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Stars Earned
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Rounding Rule: Look at the digit to the right! 5 or more? Round UP! 4 or less? Round DOWN!
Level 1: Round to Nearest 10
First Round Each Number, Then Find the Estimated Sum!
37
+
42
=
?
Round 1st:
+
Round 2nd:
=
Est. Sum:
Estimate Detective
Is the Estimated Sum HIGHER or LOWER than the Exact Sum?
Target Problem
48 + 31
Interactive Sandbox Experiment
Test Custom Numbers & Rounding Bases!
Step-by-Step Breakdown
268 rounds to 300 | 142 rounds to 100
Estimated Sum: 300 + 100 = 400
Exact Sum = 410 (Difference of 10)
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Awesome Estimation!
You correctly rounded both numbers and found the estimated sum!