Question

help me pls. no irrelevant answers​ (with steps too)

Answer 1

Answer:

2 question

(a) 439+334+4,317439+334+4,317

Rough estimate-

439+334+4,317\ \Rightarrow400+300+4,300\ =5,000439+334+4,317 ⇒400+300+4,300 =5,000

Closer estimate-

439+334+4,317\ \Rightarrow440+330+4,320\ \Right Arrow\ 5,090439+334+4,317 ⇒440+330+4,320 ⇒ 5,090

(b) 1,08,734-47,5991,08,734−47,599

Rough estimate-

1,08,734-47,599\ \Rightarrow1,08,700-47,600\ \Rightarrow61,1001,08,734−47,599 ⇒1,08,700−47,600 ⇒61,100

Closer estimate-

1,08,734-47,599\ \Rightarrow1,08,730-47,600\ =61,1301,08,734−47,599 ⇒1,08,730−47,600 =61,130

(c) 8,325-4918,325−491

Rough estimate-

8,325-491\ \Rightarrow8,300-500\ =7,8008,325−491 ⇒8,300−500 =7,800

Closer estimate-

8,325-491\ \Rightarrow8,330-490\ =7,8408,325−491 ⇒8,330−490 =7,840

(d) 4,89,348-48,3654,89,348−48,365

Rough estimate-

4,89,348-48,365\ \right arrow4,89,300-48,400\ =4,40,9004,89,348−48,365 ⇒4,89,300−48,400 =4,40,900

Closer estimate-

4,89,348-48,365\ \Rightarrow4,89,350-48,370\ =4,40,9804,89,348−48,365 ⇒4,89,350−48,370 =4,40,980

3nd question

Ncert solutions

Grade 6

Mathematics

Chapters in NCERT Solutions - Mathematics, Class 6

Exercises in Knowing Our Numbers

Question 3

Q3) Estimate the following products using general rule:

(a) 578 × 161 (b) 5281 × 3491

(c) 1291 × 592 (d) 9250 × 29

Make four more such examples.

Solution 3:

(a)578\times161578×161

Rounding off using general rule

578\Rightarrow600\ \ and\ \ 161\Rightarrow200578⇒600 and 161⇒200

So, 600\times200\ =\ 1,20,000600×200 = 1,20,000

(b) 5,281\times3,4915,281×3,491

Rounding off using general rule

5,281\Rightarrow5,000\ \ and\ \ 3,491\Rightarrow3,0005,281⇒5,000 and 3,491⇒3,000

So, 5,000\times3,000\ =\ 1,50,00,0005,000×3,000 = 1,50,00,000

(c) 1,291\times5921,291×592

Rounding off using general rule

1,291\Rightarrow1,300\ \ and\ \ 592\Rightarrow6001,291⇒1,300 and 592⇒600

So, 1,300\times600\ =\ 7,80,0001,300×600 = 7,80,000

(d) 9,250\times299,250×29

Rounding off using general rule

9,250\Rightarrow9,000\ \ and\ \ 29\Rightarrow309,250⇒9,000 and 29⇒30

So, 9,000\times30\ =\ 2,70,0009,000×30 = 2,70,000