This script generates an array of integer calculations in a range between 0 and 100.

GenerateMathProblems.js

function uuidv4() {
  return ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, c=>(c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16))
}

function add(num1, num2) {
  return num1 + num2;
}

function substract(num1, num2) {
  return num1 - num2;
}

function multiply(num1, num2) {
  return num1 * num2;
}

function devide(num1, num2) {
  return num1 / num2;
}

function main() {
  var problems = [];
  var range = 100;
  
  for (var num1 = 0; num1 <= range; num1++ ) {
    for (var num2 = 0; num2 <= range; num2++ ) {
      if (num1 + num2 <= range) {
        var problem = {
          id: uuidv4(),
          type: "ADDITION",
          num1: num1,
          num2: num2,
          result: add(num1, num2),
          str: `${num1} + ${num2} = ${add(num1, num2)}` 
        };
        problems.push(problem)
      }
    }
  }
  
  for (var num1 = 0; num1 <= range; num1++ ) {
    for (var num2 = 0; num2 <= range; num2++ ) {
      if (num1 >= num2) {
        var problem = {
          id: uuidv4(),
          type: "SUBSTRACTION",
          num1: num1,
          num2: num2,
          result: substract(num1, num2),
          str: `${num1} − ${num2} = ${substract(num1, num2)}`
        };
        problems.push(problem)
      }
    }
  }
  
  for (var num1 = 0; num1 <= range; num1++ ) {
    for (var num2 = 0; num2 <= range; num2++ ) {      
      if (num1 * num2 <= range) {
        var problem = {
          id: uuidv4(),
          type: "MULTIPLICATION",
          num1: num1,
          num2: num2,
          result: multiply(num1, num2),
          str: `${num1} × ${num2} = ${multiply(num1, num2)}`
        };
        problems.push(problem)
      }
    }
  }
  
  for (var num1 = 0; num1 <= range; num1++ ) {
    for (var num2 = 0; num2 <= range; num2++ ) {
      if (num1 % num2 == 0) {
        var problem = {
          id: uuidv4(),
          type: "DIVISION",
          num1: num1,
          num2: num2,
          result: devide(num1, num2),
          str: `${num1} ÷ ${num2} = ${devide(num1, num2)}`
        };
        problems.push(problem)
      }
    }
  }
  console.log(JSON.stringify(problems));
}

main();