Place value

70

By identifying its position in the number, where each position represents a power of ten.

1 is in the hundreds place, so its value is 100.

30, because it is in the tens place.

The underlined digit is 4, which is in the tens place.

108 base ten blocks consist of 1 hundred block, 0 ten blocks, and 8 one blocks.

Each base ten block represents a unit of ten, with a single block representing 1, a rod representing 10, and a flat representing 100.

50.

0 is in the tens place, so its value is 0.

Count the number of hundreds, tens, and ones blocks, then combine their values.