Add Decimals - Arithmetic Step by Step

Add 2.4 + 1.37 by lining up the decimal points, padding 2.4 to 2.40, then adding column by column from right to left: 0+7=7, 4+3=7, 2+1=3, giving 3.77.

Example

add-decimals.math

2.4 + 1.37

step: line up: 2.4 + 1.37
step: pad 2.4 as 2.40
step: hundredths: 0 + 7 = 7, write 7
step: tenths: 4 + 3 = 7, write 7
step: ones: 2 + 1 = 3, write 3
step: 2.4 + 1.37 = 3.77

decimal-addition Line up the decimal points so digits in the same place are in the same column. Pad shorter decimals with trailing zeros if needed. Then add column by column from right to left, carrying as usual. Place the decimal point directly below the decimal points above.