Write the missing number. 70 divided by what equals 3.5.
We know that 70 divided by two is 35. So 70 divided by 20 equals 3.5. We could also use the inverse operation to help us find the answer. 3.5 multiplied by two equals seven. So 3.5 multiplied by 20 equals 70. 70 divided by 20 equals 3.5.
To find the answer using division, we divided 70 by two to give us an answer of 35. Then we used this fact to help us calculate 70 divided by 20, equals 3.5. We also used the inverse operation, multiplication, to help us find the answer. We know that 3.5 multiplied by two is seven. So 3.5 multiplied by 20 is 70. Both methods gave us the correct answer of 20.