I need help on this pls help me on this maths

1300 and 20

Step-by-step explanation:

1. Given expression= 98.5 x 13

where 98.5 is near to 100 by rounding off to the nearest ten.

Therefore the product becomes  

98.5 x 13=100 x 13 = 1300.  

Thus the estimated value of 98.5 x 13=1300  

Estimate or round off a value means to get approximate answer which close to the correct answer. We can estimate or round off to whatever place (hundred, tens, ones, etc) we want .

Given : 102.3 divided by 4.7  

We have to estimate 102.3 divided by 4.7  

Since, estimation is the roughly calculation and is usually involves rounding to the nearest values so that they are easy to cancel out.  

Since, we have to divide,  

102.3 divided by 4.7  

Rounding 102.7 to nearest tens place , we get, 102. 7 = 100  

And Rounding 4.7 to nearest  ones place, we get, 4.7 = 5  

Thus, when divide 100 by 5 , we get 20.  

Thus,  102.3 divided by 4.7 ≈ 20  

Thus, The estimate result of 102.3 divided by 4.7 is 20.

Hope this helps!!

people went from manufacturing one object at a time by hand to manufacturing many objects in factories

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step-by-step explanation: