Estimate Differences

On Iqleel, Grade 3 students will learn the important skill of estimating differences. Before finding the exact answer, learners will practice rounding multi-digit numbers to the nearest ten or hundred. This allows them to quickly find an approximate answer, a key strategy for checking whether their final subtraction is reasonable and makes sense in word problems.

• Problem Solving and Logic
• Number Sense and Operations
• Whole Numbers
• Place Value
• Subtraction
• Word Problems
• Estimation
• Subtract
• Difference
• Minus Sign
• Operations
• Equation
• Inverse Operation
• 4-Digit Numbers
• Algorithms
• Regrouping
• 3-Digit Numbers
• Estimate

• AC9M3N05 — estimate the quantity of objects in collections and make estimates when solving problems to determine the reasonableness of calculations
• ENG-MATH-Y3-AS.5 — Estimate the answer to a calculation and use inverse operations to check answers.
• NY-3.OA.8
• 3.OA.D.8 — Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
• 3.OA.D.8
• MATH.3.4.B
• G3.B2.3
• MA.3.NSO.1.4
• BC.MATH.G3.CC.02
• AB.MATH.G3.MAT3-OI1-GQ2-LO1
• ZA.CAPS.MATH.G3.NOR.1.12

• Round Whole Numbers to the Nearest 10 (up to 100)
• Subtract Tens
• Round Whole Numbers to the Nearest 10 or 100