1. 有答案。
2. 因为两位数乘以1位数的口算是四年级的基础数学内容，学生在四年级已经学习了乘法的概念和方法，可以进行简单的口算计算。
3. 在四年级，学生已经学习了乘法的基本规则和口诀，可以通过口算得出两位数乘以1位数的答案。
这样的口算题目对于四年级的学生来说是可以解答的，是他们数学能力的一部分延伸。
两位数乘以1位数的四年级口算有答案
以下是两位数乘以一位数的四年级口算答案：
1. 2 x 1 = 2
2. 3 x 1 = 3
3. 4 x 1 = 4
4. 5 x 1 = 5
5. 6 x 1 = 6
6. 7 x 1 = 7
7. 8 x 1 = 8
8. 9 x 1 = 9
请注意，在进行口算时，要注意将两个数字对齐，并按照从右到左的顺序进行计算。同时，如果需要进位，需要在结果的个位或十位上加上相应的进位。
两位数乘以1位数的四年级口算有答案
4/9×4/3=16/27 1/3×1/3=1/9 1/2×1/3=1/6 2/7×7/2×2/7=2/7 21/25×25/42=1/2 4/5×3/4=3/5 8/7×1/2=4/7 7/4×1/4×1/2=7/32 1/7×1/2=1/14 2/3×5/6=5/9 1/5×3/8=3/40 3/5×5/8=3/8 6/7×3/2=9/7 5/6×8/3=20/9 4/11×3/4=3/11 4/9×3/8=1/6 5/3×1/5=1/3 4/3×4/9=16/27 1/3×1/2=1/6 2/7×1/2＝1/7 41/12×1/4=41/48 1/4×3/16=3/64 1/12×9/4=3/16 75/8×1/5=15/8 7/12×1/9＝ 7/108 2/3×7/3＝14/9 3/8×9/4＝27/32 5/3×3/5＝1 4/5×5/8＝1/2 7/9×9/7＝1 2/3×1/7=2/21 1/4×3/50=3/200 4/5×1/2= 2/5 2/3×29/8=29/12 3/2×7/9=7/6 2/3×3/4=1/2 5/6×1/3=5/18 6/5×1/6 =1/5 2/1×7/2=7 3/2×1/3=1/2 1/22×4/5=2/55 5/6×8/3=20/9 4/11×3/4=3/11 2/3×5/6=5/9 1/5×3/8=3/40 3/5×5/8=3/8 8/7×1/2=4/7 7/4×1/2=7/8 1/7×1/2=1/14 2/3×5/6=5/9 8/7×3/2=12/7 5/12×1/9＝5/108 7/4××1/2=7/8 1/7×1/2=1/14 2/3×5/6=5/9 2/3×1/2=1/3 2/3×5/6=5/9 1/5×3/8=3/40 2/3×7/3＝14/9 8/7×1/2=4/7 1/7×1/2=1/14 2/3×5/6=5/9 1/5×3/8=3/40 3/5×5/8=3/8 5/6×1/3=5/18 6/5×1/6 =1/5 2/1×7/2=7 3/2×1/3=1/2 1/22×4/5=2/55 5/6×8/3=20/9 4/11×3/4=3/11 2/3×5/6=5/9 1/5×3/8=3/40 3/5×5/8=3/8 4/3×4/9=16/27 1/3×1/2=1/6 1/7×5/2=5/14 1/3×5/6=5/18 1/5×3/8=3/40 3/5×5/8=3/8 6/7×3/2=9/7 5/6×8/3=20/9 4/11×3/4=3/11 4/9×3/8=1/6 5/3×1/5=1/3 4/3×4/9=16/27 1/3×1/2=1/6 2/7×1/2＝1/7 6/7×3/2=9/7 5/6×8/3=20/9 4/11×3/4=3/11 3/5×5/8=3/8 8/7×1/2=4/7 7/4×1/2=7/8 1/7×1/2=1/14 2/3×5/6=5/9 4/9×3/8=1/6 5/3×1/5=1/3 4/3×4/9=16/27 1/3×1/2=1/6 2/7×1/2＝1/7 41/12×1/4=41/48 1/4×3/16=3/64 1/12×9/4=3/16 7/12×1/9＝ 7/108 2/3×7/3＝14/9 3/8×9/4＝27/32 5/3×3/5＝1 4/5×1/2= 2/5 1/3×1/3=1/9 2/3×5/6=5/9 1/5×3/8=3/40 3/5×5/8=3/8 6/7×3/2=9/7 5/6×8/3=20/9 4/5×3/4=3/5 8/7×1/2=4/7 7/4×1/2=7/8 1/7×1/2=1/14 1/3×1/3=1/9 4/5×5/8＝1/2 7/9×9/7＝1 2/3×1/7=2/21 1/4×3/5=3/20 4/5×1/2= 2/5 2/3×29/8=29/12 3/2×7/9=7/6 2/3×3/4=1/2 5/6×1/3=5/18 6/5×1/6 =1/5 2/1×7/2=7 3/2×1/3=1/2 1/22×4/5=2/55 5/6×8/3=20/9 4/11×3/4=3/11 2/3×5/6=5/9 4/11×3/4=3/11 2/3×5/6=5/9 5/6×8/3=20/9 4/5×3/4=3/5 1/5×3/8=3/40 3/5×5/8=3/8 8/7×1/2=4/7 7/4×1/4=7/16 4/9×3/8=1/6 5/3×1/5=1/3 4/3×4/9=16/27 1/3×1/2=1/6 5/6×8/3=20/9 4/11×3/4=3/11 1/7×1/2=1/14 2/3×5/6=5/9 1/2×1/3=1/6 1/4×3/16=3/64 4/11×3/