The Cleanest Village

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Regrouping is when we combine 10 ones to make 1 ten, or 10 tens to make 1 hundred. For example, in 38 + 16, we add 8 + 6 = 14, which is 1 ten and 4 ones. We write 4 in the ones place and carry 1 to th

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Step 1: Add ones: 8 + 6 = 14 (write 4, carry 1) Step 2: Add tens: 3 + 7 + 1 = 11 (write 1, carry 1) Step 3: Add hundreds: 4 + 4 + 1 = 9 Answer: 914

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Balance = Amount Paid - Cost Balance = ₹150 - ₹113 = ₹37 You will get ₹37 as change.

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If balance is ₹0, it means: Cost = Amount Paid - Balance Cost = ₹200 - ₹0 = ₹200 The item cost exactly ₹200.

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Since we cannot subtract 9 from 0, we need to regroup: 310 becomes 3 hundreds, 0 tens, 10 ones Since we cannot subtract 7 from 0 tens, regroup again: 310 becomes 2 hundreds, 10 tens, 10 ones Now: 10 -

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Cost of 2 oranges = 2 × ₹21 = ₹42 Amount paid = ₹50 Balance = ₹50 - ₹42 = ₹8 Krishna gets ₹8 as change.

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Estimation means finding an approximate or rough answer. We round numbers to the nearest ten or hundred to make calculations easier. For example, 438 + 476 can be estimated as 440 + 480 = 920.

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Children waiting = Total children - Children who visited Children waiting = 438 - 215 = 223 223 children are still waiting to visit the bridge.