1、十几减9,1,13,（选题源于教材P11第1题）,14,4,5,94 = 95 = 139 = 149 =,2. 送信。,（选题源于教材P11第2题）,3. 移动 ，从卡片上的数里减去它。,（选题源于教材P11第3题）,109 = 1 149 = 5 139 = 4 179 = 8 199 = 10 129 = 3 159 = 6 189 = 9 169 = 7 119 = 2,4. 先说得数，再写算式。,99 = 18 29 = 11 69 = 15 89 = 17 59 = 14 39 = 12 79 = 16 49 = 13,（选题源于教材P11第4题）,139 = 4 119 = 2
2、149 = 5 179 = 8 129 = 3 159 = 6 169 = 7 189 = 9,5.,2,10,8,5,119 = 155 = 179 = 149 = 129 = 199 = 1810 = 174 = 162 =,3,10,（选题源于教材P11第5题）,8,13,14,1.圈一圈，填一填。 (1),知识点,掌握十几减9的多种算法,159,6,圈一圈略,5,6,6,6,1,5,6,(2),139,4,圈一圈略,2.请把下列算式按得数从大到小排列。,易错点,( ) ( ) ( ) ( ) ( ),189,179,169,149,129,辨析：先算出各算式的得数，再把算式按得数从大到小排列。,3.采花蜜。,提高十几减9的应用能力,还有几朵花没有采？, (朵),13,9,4,
