디딤돌편집부
저자:디딤돌편집부
1.두수의합이10인세수의덧셈2.두수의차가10인세수의뺄셈3.받아올림이있는(몇)+(몇)4.받아내림이있는(십몇)-(몇)5.(몇십)+(몇),(몇)+(몇십)6.받아올림,받아내림이없는(몇십몇)±(몇)7.받아올림,받아내림이없는(몇십몇)±(몇십몇)
*인증유형:공급자적합성확인
