Estimating the sum by rounding up to the nearest 10 online games

Estima.ting the sum by rounding up to the nearest 10 online games for children in second grade, third grade. During this communicative online math quiz, students will learn how to add two numbers in order to find the sum. After they have found the sum, they are expected to round it up to the nearest ten. An example is 7 + 4 = 11, moreover, if the number is rounded to the nearest ten, the expected answer is 10. Students that will take this quiz will have to watch out for this or else the response will always appear not correct. This is a fill-gap quiz and after the answer is found, the child is expected to put it in the space available and then submit. This is suitable for children in 2nd, 3rd and 4th grades.