Respuesta :

step 1

Estimate the given numbers to the nearest ten

so

56 -------> 60 (because 56≥55)

85 -----> 90 (because 85≥ 85)

16 -----> 20 (because 16≥15)

85 -----> 90 (because 85≥ 85)

so

60+90+20+90=260

the estimate sum is 260