六年级的英语翻译

ten kilometres/kilmeters an/per hour

he is twice as old as me / his age is twice the number of mine

make them keep quiet

add these numbers up

maths contest/competition

forty-six minus nine equals/is equal to/is thirty-eight

seven times eight equals/is equal to/is fifty-six

fifty-four divided by six equals/is equal to/is

twenty-eight plus twenty-two equals/is equal to/is fifty

seventy-five minus forty-five equals/is equal to/is thirty

twelve times five equals/is equal to/is sixty

eighty-eight divided by eleven equals/is equal to/is eight

若有不明白请一定追问