Balance addition equations – up to three-digit
Learn with an example
➡️ Which number makes the equation true?
_____+ 314 = 105 + 352
First, add 105 + 352:
? + 314 = 105 + 352
? + 314 = 457
Decide which number makes the addition number sentence true. You can subtract to find the answer.
Subtract:
457 − 314 = 143
The missing number is 143.
➡️ Which number makes the equation true?
606 + 146 = 359 + ____
First, add 606 + 146:
606 + 146 = 359 + ?
752 = 359 + ?
Decide which number makes the addition number sentence true. You can subtract to find the answer.
Subtract:
752 − 359 = 393
The missing number is 393.
Which number makes the equation true?
236 + 144 = 262 +
First, add 236 + 144:
236 + 144 = 262 + ?
380 = 262 + ?
Decide which number makes the addition number sentence true. You can subtract to find the answer.
Subtract:
380 − 262 = 118
The missing number is 118.
Let’s practice!
