bằng 2

Th1 : Tính như bình thường

1 + 1 = 2

Th2 : Biến đổi bằng căn bậc 2

1 + 1

= 99999999999999999999999999...... - 9999999999999999999999999...... + 1 + 1

= 99999999999999999999999999...... - \(\sqrt{9999999999999999999999999......^2}\)+ 1 + 1

= 99999999999999999999999999...... - -9999999999999999999999999...... + 1 + 1

= 99999999999999999999999999...... + 9999999999999999999999999...... + 1 + 1

= 100000000000000000000000000...... + 10000000000000000000000000......

= 200000000000000000000000000......

Th3 : Đột phá bằng căn bậc hai

1 + 1

= 1 + \(\sqrt{1}\)

= 1 + - 1

= 1 - 1

= 0

a)\(x:6=200-184\)

\(=>x:6=16\)

\(=>x=16.6\)

\(=>x=96\)

b)\(84:x=601-597\)

\(=>84:x=4\)

\(=>x=84:4\)

\(=>x=21\)

6m7dm = 0,0067 km = 0,067 hm = 0,67 dam = 6,7 m = 67 dm = 670 cm = 6700 mm

ta có: \(x\times\)4-12=24

\(\Rightarrow\)\(x\)=(24+12)/4

vậy \(x\)=36/4=9

17x6+17x5-17x4+17x1

=17x(6+5-4+1)

=17x8

=136

bác Tân có số quả cam:

35:5x1=7(quả)

số cam bà còn:

35-7=28(quả)

bà chia cho các cháu:

28:4x1=7(quả)

đáp số: tự ghi

Số bị chia = 10 và Số chia = 4

9:x>9:3          (x#0)

=> 9:x>3

=>9>3x(với x>=0)

=> 3x=6=> x=2

      3x=3=> x=1

    3x=0(loaaji vì x#0)

vậy ........