___________
Maths
Column addition and subtraction with 4 digit numbers

Starter quiz

  • Which equations would it be most efficient to solve using column subtraction?
    • 476 − 376 =
    • 565 − 284 =  ✓
    • 557 − 555 =
    • 632 − 148 =  ✓
  • Which equations could be more easily solved using a mental calculation?
    • 222 + 199 =  ✓
    • 352 + 287 =
    • 140 + 360 =  ✓
    • 388 + 165 =
  • Alex is trying to calculate the sum of 214 and 497 Which hundreds number will be closest to his answer?
    • '700' ✓
  • What is the most efficient way to calculate 285 − 99 = ?
    • Start at 99 and count on to 285
    • Use column subtraction
    • Subtract 100 then add 1  ✓
    • Subtract 100 then subtract 1
  • Look carefully at Alex’s column addition. Which of these statements about the sum is true?
    Look carefully at Alex’s column addition. Which of these statements about the sum is true?
    • The ones digit of the sum is incorrect.
    • The tens digit of the sum is incorrect.  ✓
    • The hundreds digit of the sum is incorrect.
    • The sum is correct.
  • Look carefully at Alex’s column subtraction. Which of these statements about the difference is true?
    Look carefully at Alex’s column subtraction. Which of these statements about the difference is true?
    • The ones digit of the difference is incorrect.
    • The tens digit of the difference is incorrect.
    • The hundreds digit of the difference is incorrect.  ✓
    • The difference is correct.
+