Respuesta :
Answer:
300 times 40
50 times 40
Add the answers together
Step-by-step explanation:
For this I simplified 347 to 350 and split it to 300 and 50
I also estimated 42 to 40
Instead of doing 350 times 40 it’s easier to do (300 x 40) + (50 x 40)
I hope this helps
Answer:
1400 (see my explanation below)
Step-by-step explanation:
This depends on whether you are being taught to round to the nearest 100 or nearest 10.
The closest estimate would be rounding to 10's.
350 x 40
Solve quickly in your head by doubling 350 (700)
Double it again (1400)
And then add a zero.
14,000
Why? Because you are breaking down the 40 in 2 x 2 x 10
Doubling twice takes care of the 2 x 2 and adding the zero takes care of the 10.
