grade 2 · WN-021

Decompose a ten

Trade one ten for 10 ones when the top ones are too small.

Learn togetherFresh problem · seed 1078945748

Subtract 42 − 28.

Step 1After decomposing one ten, how many tens remain on top?4 tens − 1 ten Step 2How many ones are now on top?2 ones + 10 ones Step 3Subtract the ones.12 − 8 Step 4Subtract the tens.3 − 2 Step 5Write the whole difference.Put the tens and ones together.