Complete the formula to keep the reference to cell A1 fixed when copying.
=SUM([1]+B2)Using $A$1 locks both the column and row, making the reference absolute.
Complete the formula to fix only the column A when copying across columns.
=B1*[1]$A2 fixes the column A but allows the row to change when copied down.
Fix the error in the formula to correctly lock the row 5 when copying down.
=SUM(B[1]:D5)$5 locks the row 5 while allowing the column to change.
Fill both blanks to create a formula that multiplies the fixed cell B1 by cells in column C.
=C[1]*[2]
The row 2 is relative to multiply with C2, and $B$1 fixes the cell B1.
Fill all three blanks to create a formula that sums a fixed range from A1 to C1 and multiplies by the value in D2.
=SUM([1]:[2])*[3]
$A$1 and $C$1 fix the sum range, and D2 is the multiplier.