A laptop costs 48,750 VND and a keyboard costs 16,450 VND. What is the total cost?, 64,200 VND, 65,200 VND, 64,100 VND, 65,100 VND, A family spent 92,680 VND at a supermarket. They paid 100,000 VND. How much change should they receive?, 7,120 VND, 7,220 VND, 8,320 VND, 6,320 VND, Estimate the total cost of 34,890 VND and 26,420 VND by rounding each number to the nearest thousand., 60,000 VND, 61,000 VND, 62,000 VND, 63,000 VND, Which estimate is closest to the exact answer for 57,380 + 21,910?, 78,000, 80,000, 81,000, 79,000, Ben bought a backpack for 36,450 VND and a lunch box for 18,780 VND. He had 60,000 VND. Did he have enough money?, Yes, he had 5,770 VND left., No, he needed 4,770 VND more., Yes, he had 4,770 VND left., No, he needed 5,770 VND more., Why is estimation useful when shopping?, It gives the exact answer every time., It changes the prices of items., It replaces addition and subtraction., It helps check whether an answer is reasonable before calculating exactly.

Addition - Subtraction - Rounding

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