Respuesta :
97 rounds up to 100
78 rounds up to 80
100x80= 8,000
estimate=8,000
97x78=7,566
product=7,566
78 rounds up to 80
100x80= 8,000
estimate=8,000
97x78=7,566
product=7,566
Estimate: 97 to 100
Estimate: 78 to 80
80 times 100 = 8000
Real: 97
Real 78
97 times 78 = 7566