for each expression, estimate to decide whether the sum is closer to 800 or 900. closer to 800: 415 + 400…

for each expression, estimate to decide whether the sum is closer to 800 or 900. closer to 800: 415 + 400; closer to 900: 605 + 292, 385 + 499; 605 + 212

for each expression, estimate to decide whether the sum is closer to 800 or 900. closer to 800: 415 + 400; closer to 900: 605 + 292, 385 + 499; 605 + 212

Answer

Explanation:

Step1: Estimate 415 + 400

$415\approx400$, so $415 + 400\approx400+400 = 800$.

Step2: Estimate 605 + 292

$605\approx600$, $292\approx300$, so $605 + 292\approx600 + 300=900$.

Step3: Estimate 385 + 499

$385\approx400$, $499\approx500$, so $385 + 499\approx400+500 = 900$.

Step4: Estimate 605 + 212

$605\approx600$, $212\approx200$, so $605 + 212\approx600+200 = 800$.

Answer:

415 + 400: Closer to 800 605 + 292: Closer to 900 385 + 499: Closer to 900 605 + 212: Closer to 800