Question

EXAMPLE 4
ESUW
28
Solution
43000.
21397 estimated to the nearest thu
27807 estimated to the nearest thousand
42505 estimated to the nearest thousand
Hence, the required estimation = (21000 + 28000 + 43000) = 92000.
Estimate the difference (673 - 258) to the nearest hundred.
EXAMPLE 5.
Solution
673 estimated to the nearest hundred = 700.
258 estimated to the nearest hundred = 300.
Hence, the required estimation = (700 - 300) = 400.
EXERCISE 1D
(d) 16378
1. Round each of the following numbers to the nearest ten:
(c) 3869
(a) 36
(b) 173
(d) 98165
2. Round each of the following numbers to the nearest hundred:
(a) 814
(b) 1254
(c) 43126
3. Round each of the following numbers to the nearest thousand:
(a) 793
(b) 4826
(c) 16719
(d) 28394
4. Round each of the following numbers to the nearest ten thousand:
(a) 17514
(b) 26340
(c) 34890
(d) 27268
Estimate each sum to the nearest ten:
7. (14 +
10. (77 +
6. (43 +78)
9. (95 +58)
5. (57 +34)​

Answer 1

Answer:

Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.