a) 27 × 10 = 270;    72 × 100 = 7200;    14 × 1000 = 14000

86 × 10 = 860;     103 × 10 = 10300;    452 × 1000 = 452000

358 × 10 = 3580;     1977 × 100 = 197700;    300 × 1000 = 300000

b) 80 :10 = 8;     400 : 100 = 4    ;6000 : 1000 = 6

300 : 10 = 30;     4000 : 100 = 40    ; 60000 : 1000 = 60

2000 :10 = 200;     40000 :100 = 400    ;600000 : 1000 = 600

c) 64 × 10 = 640;    32 × 100 = 3200;    95 × 1000 = 95000

640 : 10 = 64;     3200 : 100 = 32;    95000 : 1000 = 95

= 10x4+ 100x3

= 40+300

=430

k mk nhé

340 bạn nhé

430 nhé !

0 bít ahihi tích nha ahihi^^

Ta có:

= 10-10.10:10

= 10 - 100 : 10

= 10 - 10

= 0

Vì các số có quá trình tương tự nên kết quả là : 10 + 0 + 0 + 0 + 0 +...+ 0 = 10

100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 nha

1 chứ bao nhiêu

đặt A=100^10+1/100^10-1

B=10^100+1/10^100-3

ta có:\(A=\frac{100^{10}+1}{100^{10}-1}=\frac{100^{10}-1+2}{100^{10}-1}=\frac{100^{10}-1}{100^{10}-1}+\frac{2}{100^{10}-1}=1+\frac{2}{100^{10}-1}\)

\(B=\frac{10^{100}+1}{10^{100}-3}=\frac{10^{100}-3+4}{10^{100}-3}=\frac{10^{100}-3}{10^{100}-3}+\frac{4}{10^{100}-3}=1+\frac{4}{10^{100}-3}=1+\frac{4}{100^{10}-3}\)

vì 100¹⁰-1>100¹⁰-3

=>\(\frac{4}{100^{10}-1}<\frac{4}{100^{10}-3}\)

=>A<B

 Arcobaleno sai

Ta có:

\(\frac{100^{10}+1}{100^{10}-1}=\frac{100^{10}-1+2}{100^{10}-1}=\frac{100^{10}-1}{100^{10}-1}+\frac{2}{100^{10}-1}=1+\frac{2}{10^{20}-1}=1+\frac{4}{2.10^{20}-2}\)

\(\frac{10^{100}+1}{10^{100}-3}=\frac{10^{100}-3+4}{10^{100}-3}=\frac{10^{100}-3}{10^{100}-3}+\frac{4}{10^{100}-3}=1+\frac{4}{10^{100}-3}=1+\frac{4}{10^{100}-3}\)

Thấy: \(2.10^{20}-2<10^{100}-3\)

\(\Rightarrow\frac{4}{2.10^{20}-1}>\frac{4}{10^{100}-3}\)

\(\Rightarrow\frac{100^{10}+1}{100^{10}-1}>\frac{10^{100}+1}{10^{100}-3}\)

100⁵ : 100³ = 100²

10² . 10¹ = 10³

500²⁰⁰ . 500¹⁰ = 500²¹⁰

10⁵ . 10² = 10⁷

100³⁰ . 100¹⁰ = 100⁴⁰

200¹⁰⁰ : 200¹⁰ = 200⁹⁰

100²⁰ . 100¹⁰ = 100³⁰

300¹⁰⁰ . 300¹⁰⁰ = 300²⁰⁰

100⁵ : 100³

= 100^{5 - 3}

= 100²

10² . 10¹

= 10^{2 + 1}

= 10³

500²⁰⁰ . 500¹⁰

= 500^{200 + 10}

= 500²¹⁰

10⁵ . 10²

= 10^{5 + 2}

= 10⁷

100³⁰ . 100¹⁰

= 100^{30 + 10}

= 100⁴⁰

200¹⁰⁰ : 200¹⁰

= 200^{100 - 10}

= 200¹⁹⁰

100²⁰ . 100¹⁰

= 100^{20 + 10}

= 100³⁰

300¹⁰⁰ .300¹⁰⁰

= 300^{100 + 100}

= 300²⁰⁰

ghi sai đề ak, có 2 dấu trừ ở phép số 2

100 + 100 + 100 + 100 x 10 + 100 x 10

= 100 + 100 + 100 + 1000 + 1000

= 2300

100*3=300

100*10=1000

1000*2=2000

300+2000=2300

k mk nhé sakura

100+100+100+100.10+100.10

=100+100+100+1000+1000

=300+2000

=2300

k mih nha

A>B

nhanh , tắt ,gọn ,lẹ nhá

A>B ok nha