Make the Greatest and Least Number

Before handing out the worksheet, briefly introduce the concept with a short oral warm-up or a visual model on the board. Let students work through the first item together as a class, then finish the rest independently or with a partner, encouraging them to talk through their thinking: "What strategy are you using? How do you know that is right?" After completing the worksheet, review any missed problems together and discuss the reasoning rather than just the answer. For extra support, let students use manipulatives or draw pictures alongside the written problems. These build numbers from 10s & 1s worksheets work well as daily practice, homework, or a focused review activity.

Use two digit cards to build the greatest and the least 2-digit number. The tens digit tells the most. Put the bigger digit in the tens place for the greatest number, and the smaller digit there for the least number. The directions on the page read: Use both digit cards in each set. Then, write the greatest and the least number you can make. The answer key shows every answer.

Yes, both. We made it for 1st Grade place value, and the page works the same whether it lands on a kitchen table or a center rotation. At home, most families go through it together and talk the answers out loud, and that talking is where most of the learning happens with build numbers from 10s & 1s. In class it runs well as independent work while you pull a small group. Print one copy or thirty, whichever the day needs.

Students take a stated number of tens and ones (e.g., 5 tens and 3 ones) and determine the resulting number (53), reversing the decomposition process.

Use place value sliders or flip books where students physically combine a tens strip with a ones strip to reveal the composed two-digit number.

Yes - CCSS 1.NBT.B.2 requires students to understand that two-digit numbers represent amounts of tens and ones, which building activities directly address.

First graders should understand that a two-digit number is composed of tens and ones (CCSS 1.NBT.B.2). For example, 43 means 4 tens and 3 ones. They should use this understanding to compare two-digit numbers and add within 100.

Use base-ten blocks: ten units snapped together make one ten-rod. Have students build numbers physically, then draw them, then write the expanded form. Worksheets with base-ten block pictures that students count and convert to numbers bridge the concrete-to-abstract gap.

Base-ten blocks are manipulatives where a small cube represents 1, a rod represents 10, and a flat represents 100. They make place value tangible. Students can physically trade 10 ones for 1 ten, which builds understanding of regrouping for addition and subtraction.