Câu hỏi của Duy Đần

Question

$a.\frac{27.45+27.55}{2+4+6+...+14+16+18}$

$b.\frac{26.108-26.12}{32-28+24-20+16-12+8-4}$

$c.\frac{27.4500+135.550.2}{2+4+6+...+14+16+18}$

ミ★๖ۣۜSóĭ๖Dạo๖ۣۜBước★彡 · Accepted Answer

$a.\frac{27.45+27.55}{2+4+6+...+14+16+18}=\frac{27.100}{\frac{\left(2+18\right).9}{2}}=30$

$b.\frac{26.108-26.12}{32-28+24-20+16-12+8-4}=\frac{26\left(108-12\right)}{\left(32-28\right).4}=\frac{26.96}{4.4}=156$

$c.\frac{27.4500+135.550.2}{2+4+6+...+14+16+18}=\frac{270.450+270.550}{\frac{\left(2+8\right).9}{2}}$

$d.\frac{48.700-24.45.20}{45-40+35-30+25-20+15-10+5}=\frac{48.700-48.450}{5.5}$$=\frac{48\left(700-450\right)}{25}=\frac{48.250}{25}=480$

#ĐinhBa

Câu trả lời:

$a.\frac{27.45+27.55}{2+4+6+...+14+16+18}=\frac{27.100}{\frac{\left(2+18\right).9}{2}}=30$

$b.\frac{26.108-26.12}{32-28+24-20+16-12+8-4}=\frac{26\left(108-12\right)}{\left(32-28\right).4}=\frac{26.96}{4.4}=156$

$c.\frac{27.4500+135.550.2}{2+4+6+...+14+16+18}=\frac{270.450+270.550}{\frac{\left(2+8\right).9}{2}}$

$d.\frac{48.700-24.45.20}{45-40+35-30+25-20+15-10+5}=\frac{48.700-48.450}{5.5}$$=\frac{48\left(700-450\right)}{25}=\frac{48.250}{25}=480$

#ĐinhBa