Question

Estimate each of the following products by rounding off the first number downwards
and the second number upwards:
19. 356 x 278
20. 472 x 76
21. 578 x 369​

Answer 1

Answer:

As we have to take products of round off of the first and second upwards so 19. 356 x 278= 350 x 280= 98000

20. 472 x 76= 470 x 80= 37600

21. 578 x 369= 570 x 370=210900

Step-by-step explanation:

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