Question

subtract.
(1) \

$$\begin{array}{r} 321 \\\\ -\\phantom{0}34 \\\\ \\hline 187 \\end{array}$$

(5) \

$$\begin{array}{r} 502 \\\\ -135 \\\\ \\hline \\end{array}$$

(2) \

$$\begin{array}{r} 321 \\\\ -\\phantom{0}45 \\\\ \\hline \\end{array}$$

(6) \

$$\begin{array}{r} 502 \\\\ -145 \\\\ \\hline \\end{array}$$

(3) \

$$\begin{array}{r} 321 \\\\ -156 \\\\ \\hline \\end{array}$$

(7) \

$$\begin{array}{r} 502 \\\\ -246 \\\\ \\hline \\end{array}$$

(4) \

$$\begin{array}{r} 321 \\\\ -175 \\\\ \\hline \\end{array}$$

(8) \

$$\begin{array}{r} 502 \\\\ -257 \\\\ \\hline \\end{array}$$

Explanation:

Calculate column subtractions for questions (1) to (4)

$$
LATEXBLOCK0
$$

Calculate column subtractions for questions (5) to (8)

$$
LATEXBLOCK1
$$

Answer:

No.	Problem	Answer
(2)	\(321 - 45\)	\(276\)
(3)	\(321 - 156\)	\(165\)
(4)	\(321 - 175\)	\(146\)
(5)	\(502 - 135\)	\(367\)
(6)	\(502 - 145\)	\(357\)
(7)	\(502 - 246\)	\(256\)
(8)	\(502 - 257\)	\(245\)