Fill in the blank:
6+=+6=6.
If a is any whole number, then a+0=0+a=a.Here, zero is called the additive identity.
∴6+0=0+6=6.
Fill in the blanks.
+69=89
Fill in the following blanks: 1518=6=10=30. Are these equivalent ratios?
Fill in the boxes:
13+6=76