Round the given factors to the nearest highest place value to find the estimated product. Encircle the letter of the correct answer.
1.) 22.486× 3.7=
a) 66
b) 69
c) 88
2.) 31.182×9.412=
a) 279
b) 288
c) 310
3.) 20.817 × 8.78
a) 160
b) 168
c) 189
4.) 78.261 × 23.5
a) 1 794
b) 1 872
c) 1 896
5.)34.892 x 8.411 =
a) 272
b) 280
c) 315​