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Question Video: Dividing Two-Digit Numbers by Eight Mathematics • 3rd Grade

The robot divides any number by 8 and gives a result. In this case, the number 16 gives a result of 2 as 16 ÷ 8 = 2. What will the result be in the following case? 40 ÷ 8 = _ What will the result be in the following case? 64 ÷ 8 = _

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Video Transcript

This robot divides any number by eight and gives a result. In this case, the number 16 gives a result of two as 16 divided by eight equals two. What will the result be in the following case? 40 divided by eight equals what. And what will the result be in the following case? 64 divided by eight equals what.

In the first part of this question, we have to help the robot calculate 40 divided by eight. And in the second part of the question, we have to help the robot calculate 64 divided by eight. Did you notice that in all of the calculations we’re dividing by eight? How could we calculate 40 divided by eight? We could use an array and our knowledge of the eight times table to help.

When we’re dividing by eight, we can think of this as dividing a number into equal groups of eight. Here’s one group of eight, which gives us a total of eight. Two eights make 16. Three eights make 24. Eight, 16, 24. Four eights are 32, and five eights make 40. Eight, 16, 24, 32, 40. So, if the number 40 goes in and the robot divides it by eight, the result will be five. There are five eights in 40. 40 divided by eight equals five.

Now, we just need to answer the second part of the question. What is 64 divided by eight? How many eights are there in 64? Let’s keep on counting in eights. We already know that five groups of eight makes 40, so let’s just keep counting forward in eights. Five eights are 40, six eights are 48, seven eights are 56, and eight eights are 64. There are eight eights in 64. If we put the number 64 into the robot and he divides it by eight, the result will be eight because 64 divided by eight equals eight.

40 divided by eight equals five and 64 divided by eight equals eight. We found the results using arrays and our knowledge of the eight times table.

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