BÀI 1:tính nhanh

1/3 - 3/4 -(-3/5) + 1/64 - 2/9 -1/36 +1/15 

b) 1/99 - 1/99.98 - 1/98.97 - 1/97.96 -......- 1/3.2 - 1/2.1

giúp mk với mk đg cần gấp

Cho 20 ví dụ về nguồn sáng và 30 ví dụ về vật sáng

Thực hiện phép tính
a) $\frac{-5}{16}:0,125+1,456:\frac{7}{25}$ và $\frac{1}{2}:0,8$

b) -$\frac{1}{3}$ +$\frac{1}{3}$ .(-$\frac{4}{9}$+ $\frac{5}{6}$) : $\frac{7}{12}$

c) ${(-2)}^2$ - $1\frac{5}{27}$ . (-$\frac{3}{2}$ )$\frac{1}{2}:0,8$0

d) 3,2. $\frac{1}{2}:0,8$1 - ( $\frac{1}{2}:0,8$2+$\frac{1}{2}:0,8$3) : $\frac{1}{2}:0,8$4

Thực hiện phép tính

a)  $\left|-80\right|-(4.5^2-3.2^3)$

b)$(\frac{3}{7}-\frac{9}{8})-(\frac{6}{14}-\frac{5}{8})$

c) $\frac{6}{7}+\frac{5}{7}:5-\frac{8}{9}$

d)  $(-3.2).\left(\frac{-15}{64}\right)+(0,8-2\frac{4}{15}):3\frac{2}{3}$

e) 1 + $\frac{1}{2}$ .(1+2) +$\frac{1}{3}$ .(1+2+3) +.....+$\frac{1}{16}$ .(1+....16)

f) 0,75 + 63,7+0,25 +36,3 +9,8

g) $2^3$.(-$7^2$ - $5^2$) + $(\frac{3}{7}-\frac{9}{8})-(\frac{6}{14}-\frac{5}{8})$0 - (-$(\frac{3}{7}-\frac{9}{8})-(\frac{6}{14}-\frac{5}{8})$1)

h) $(\frac{3}{7}-\frac{9}{8})-(\frac{6}{14}-\frac{5}{8})$2.11-$(\frac{3}{7}-\frac{9}{8})-(\frac{6}{14}-\frac{5}{8})$3 .9 +90

i) ( 5+ $(\frac{3}{7}-\frac{9}{8})-(\frac{6}{14}-\frac{5}{8})$4) .$(\frac{3}{7}-\frac{9}{8})-(\frac{6}{14}-\frac{5}{8})$5 + (2+$(\frac{3}{7}-\frac{9}{8})-(\frac{6}{14}-\frac{5}{8})$6). $(\frac{3}{7}-\frac{9}{8})-(\frac{6}{14}-\frac{5}{8})$7

j) ( $(\frac{3}{7}-\frac{9}{8})-(\frac{6}{14}-\frac{5}{8})$8 -1) : $(\frac{3}{7}-\frac{9}{8})-(\frac{6}{14}-\frac{5}{8})$4 -4.( 25% - $(\frac{3}{7}-\frac{9}{8})-(\frac{6}{14}-\frac{5}{8})$4)

mn giúp linh nhá linh đg cần gấp ạ

Tính

a) $(13\frac{3}{7}+4\frac{5}{13})-8\frac{3}{7}$

b) $-8.\frac{-1}{4}+(\frac{4}{3}-1\frac{5}{6}):\frac{5}{12}$

c) $\frac{2}{3}+\frac{1}{3}.(\frac{-4}{9}+\frac{5}{6}):\frac{7}{12}$

d) $\frac{3}{8}-\frac{5}{6}+\frac{1}{4}$

e) $\frac{1}{7}:(2-1\frac{5}{7})+\frac{3}{2}$

f) $\frac{1}{3}+\frac{3}{4}-\frac{7}{12}$

g) $11\frac{3}{13}-(22+5\frac{3}{13})$

h) $\frac{7}{19}.75\%+\frac{7}{19}.\frac{1}{4}+\frac{12}{19}$