Search Results For “add and subtract multiples of 10 and 100”

Add whole tens with no help.

Add 9 to any 2-digit number.

Add 11 to any 2-digit number.

Add a 2-digit number to a multiple of 10, speed challenge.

Add 19 to any 2-digit number.

Add 21 to any 2-digit number.

Add a single digit to a 3-digit number crossing the tens boundary.

Add mentally a single digit to a 3-digit number, not crossing the tens.

Add two 3-digit numbers not crossing ten or hundred.

Add mentally a single digit to a 3-digit number.

Add three small numbers with totals up to 20, with the help of bar models.

Using bar models to add fractions.