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410 prompts matching "Estimate before calculating an answer"
Spot My Strategy Choice Mistake
I am in Primary 3. Choose a slow method for a subtraction on purpose — counting back 40 on
Worked Example: Adjusting to Add
I am in Primary 3. Worked example: Show me how to solve 368 + 297 by adding 300 and then t
Explain My Rounding to 10
I am in Primary 3. I will round a number to the nearest 10. Ask me to explain which digit
Spot My Rounding-to-10 Mistake
I am in Primary 3. Round a number to the nearest 10 for me and round 45 down instead of up
Bag of Rice Rounding Word Problem
I am in Primary 3. Let’s solve a word problem: “A bag of rice costs ₦872. About how much i
Explain My Rounding to 100
I am in Primary 3. I will round three numbers to the nearest 100 and tell you my reasoning
School Pupils Rounding Word Problem
I am in Primary 3. Let’s solve a word problem: “A school has 872 pupils. About how many pu
Compare Two Lengths in Metres
Act as my tutor. I am in Primary 3. Give me a length measurement problem (e.g., “Which is
Measure Objects with a Ruler
I am in Primary 3. I will measure two objects using a ruler (in cm and m) and tell you the
Spot My Length Measuring Mistake
I am in Primary 3. Spot my measuring mistake: I’ll read a length from a ruler or metre sti
Compare Two Masses in Kilograms
Act as my tutor. I am in Primary 3. Give me a mass problem (e.g., “Which is heavier: 2 kg
Spot My Mass Comparing Mistake
I am in Primary 3. Spot my mass mistake: I’ll say which object is heavier. Sometimes I’ll
Worked Example: Finding a Mass Difference
I am in Primary 3. Worked example: Show me how to find the difference between 4 kg 200 g a
Compare Two Capacities in Litres
Act as my tutor. I am in Primary 3. Give me a capacity problem (e.g., “Which holds more: 2
Read a Container's Capacity
I am in Primary 3. I will read the capacity of two containers (in L and mL) and tell you w
Spot My Capacity Reading Mistake
I am in Primary 3. Spot my capacity mistake: I’ll say which container holds more. Sometime
Say Quarter to the Hour
I am in Primary 3. I will tell you the time when the hour hand is between 7 and 8 and minu
School Start Time Word Problem
I am in Primary 3. Let’s solve a word problem: “School starts at 8 o’clock. It is now quar
Count a Set of Naira Notes
I am in Primary 3. I will count a set of naira notes and coins (e.g., ₦50, ₦20, ₦10, ₦5).
Spot My Money Counting Mistake
I am in Primary 3. Count a pile of naira notes and coins for me and count one of the coins