About this worksheet
Sent home with its own reminder box (start with the ones, then the tens, then the hundreds), this 2nd grade homework page practices Common Core 2.NBT.7, addition and subtraction within 1,000. Four additions include a double regroup at 189 + 346 and the no-regroup control 523 + 144. Four subtractions escalate the same way, ending at 700 - 346, where a hundred must break into 9 tens and 10 ones. Two word problems close it: Maya's 345 + 218 seashells and a bakery selling 285 of its 520 cookies. The answer key spells out every trade, such as 12 - 8 = 4 ones on question 6.
