estimate: 9x30 = 270
exact: we are just off by 1/5 of 30 which is 6
exact answer: 276
first estimate answer then find exact answer simplify if possible 9 1/5*30
3 answers
9 1/5 makes 9*5+1/5=46/5
46/5*30=276
46/5*30=276
157 divide by18
estimate
estimate