Question

b156b
(9)
\

$$\begin{array}{r} 83 \\\\ - 42 \\\\ \\hline \\end{array}$$

(13)
\

$$\begin{array}{r} 83 \\\\ - \\square\\square \\\\ \\hline 42 \\end{array}$$

(10)
\

$$\begin{array}{r} 83 \\\\ - 41 \\\\ \\hline \\end{array}$$

(14)
\

$$\begin{array}{r} 83 \\\\ - \\square\\square \\\\ \\hline 41 \\end{array}$$

(11)
\

$$\begin{array}{r} 88 \\\\ - 54 \\\\ \\hline \\end{array}$$

(15)
\

$$\begin{array}{r} 88 \\\\ - \\square\\square \\\\ \\hline 54 \\end{array}$$

(12)
\

$$\begin{array}{r} 88 \\\\ - 45 \\\\ \\hline \\end{array}$$

(16)
\

$$\begin{array}{r} 88 \\\\ - \\square\\square \\\\ \\hline 45 \\end{array}$$

b157a kumon
addition and subtraction of 2-digit numbers

add, subtract or fill in the missing numbers.
(1)
\

$$\begin{array}{r} 14 \\\\ + 71 \\\\ \\hline \\end{array}$$

(5)
\

$$\begin{array}{r} 85 \\\\ - 14 \\\\ \\hline \\end{array}$$

(2)
\

$$\begin{array}{r} 25 \\\\ + 36 \\\\ \\hline \\end{array}$$

(6)
\

$$\begin{array}{r} 61 \\\\ - 25 \\\\ \\hline \\end{array}$$

(3)
\

$$\begin{array}{r} 54 \\\\ + 19 \\\\ \\hline \\end{array}$$

(7)
\

$$\begin{array}{r} 73 \\\\ - 19 \\\\ \\hline \\end{array}$$

(4)
\

$$\begin{array}{r} 43 \\\\ + 48 \\\\ \\hline \\end{array}$$

(8)
\

$$\begin{array}{r} 91 \\\\ - 48 \\\\ \\hline \\end{array}$$

Explanation:

Solve page B156b subtraction problems

$$
LATEXBLOCK0
$$

Solve page B157a addition problems

$$
LATEXBLOCK1
$$

Solve page B157a subtraction problems

$$
LATEXBLOCK2
$$

Answer:

No.	Problem	Answer
(10)	\(83 - 41\)	\(42\)
(11)	\(88 - 54\)	\(34\)
(12)	\(88 - 45\)	\(43\)
(13)	\(83 - \Box\Box = 42\)	\(\Box\Box = 41\)
(14)	\(83 - \Box\Box = 41\)	\(\Box\Box = 42\)
(15)	\(88 - \Box\Box = 54\)	\(\Box\Box = 34\)
(16)	\(88 - \Box\Box = 45\)	\(\Box\Box = 43\)
(1)	\(14 + 71\)	\(85\)
(2)	\(25 + 36\)	\(61\)
(3)	\(54 + 19\)	\(73\)
(4)	\(43 + 48\)	\(91\)
(5)	\(85 - 14\)	\(71\)
(6)	\(61 - 25\)	\(36\)
(7)	\(73 - 19\)	\(54\)
(8)	\(91 - 48\)	\(43\)