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Place Value

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Use Ones Facts with Tens

Add and subtract multiples of 10

Use cubes and towers of ten to connect ones facts to addition and subtraction with tens.

See which place changes

Roll an operation die, change a tens-and-ones model, name the place that changed, and record four new numbers.

Practice which digit changes

Practice adding 10, subtracting 10, adding 1, and subtracting 1 with mixed two-digit flash cards.

Build, break apart, and bundle place values

Drag hundreds, tens, and ones across the mat to break blocks apart or bundle groups of ten.

Trade wholes, tenths, hundredths, and thousandths

Move a whole, a tenth, and a hundredth across a decimal place-value chart to watch each piece break into 10 equal parts.

Add wholes, tenths, and hundredths

Combine decimal models by place, count the wholes, tenths, and hundredths, and write each sum without regrouping.

Trade 10 pieces for 1 in the next place

Combine decimal models, trade 10 hundredths for a tenth and 10 tenths for a whole, then write the decimal sum.

Same value with different groups of tens and ones

Name the tens and ones, then trade a ten for 10 ones to show the same two-digit number in a new way.

Same value with different place-value groups

Name the hundreds, tens, and ones, then trade blocks to show the same number in a new way.