Tens and ones

Worked solution

1. 1

   Count the four tens.

   $10, 20, 30, 40$

   Each rod stands for ten ones.

2. 2

   Count on the six loose ones.

   $41, 42, 43, 44, 45, 46$

   Each separate counter adds one to the forty.

3. 3

   Join the tens and ones.

   $40+6=46$

   The four tens and six ones are all counted in forty-six.

Worked solution

1. 1

   Find the value of the first digit.

   $70$

   The seven is in the tens place, so it means seven tens.

2. 2

   Find the value of the second digit.

   $3$

   The three is in the ones place, so it means three loose ones.

3. 3

   Build and check the number.

   $70+3=73$

   Seven tens and three ones join to make seventy-three.