console.log("足し算ゲーム!!")
const num = Math.floor(Math.random() * 5) + 1;
console.log(num); 
if (num<=1) {
    console.log("1+2は?")
}
else if(num<=2){
    console.log("1+9は?")
}
else if(num<=3){
    console.log("295+5は?")
}
else if(num<=4){
    console.log("232+151は?")
}
else{
    console.log("123456789+987654321は?")
}