rounding whole numbers Students will round whole numbers to nearest 10 Tools A B 15 20 82 80 67 70 21 20 79 80 42 40 35 40 69 70 125 130 111 110 145 150 113 110 199 200 178 180 256 260 278 280 355 360 77 80 357 360 49 50 31 30 121 120 43 40