#2 Linda's estimation of 80÷40=2 was ok. but when she divided, she relized that 43× 2 =86. she cant take away 86 from 82. it should be 1 group of 43. the quoitent is 1 with a remainder of 39
#1 43 × 3 = 129
129 + 28 = 157
157 is the number
hope this helps