Grade 4 and 5 dividing with estimating and adjusting

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https://learnzillion.com/lesson_plans/7385-divide-4-digit-dividends-by-2-digit-divisors-by-estimating-and-adjusting-the-quotient/

Example:

147 divided by 7

Lets think!!!

140 divided by 7 ????

Well I know

14 divided by 7 is 2 because the inverse is 7x2=14

So........

140 divided by 7 is 20 because the inverse is 7x20=140

then ......

147 divide by 7 is 21 because the inverse 7x20=140

and 7x1 = 7

You try!!!

1,250 divided by 5